【问题背景】
如图,
,点
为
上方一点,
、
为
上两点,连接
、
,分别交
于
、
两点,且
.
【探究求证】
(1)如图
,过点
作
,求证:
;
(2)如图
,点
为
上一点,连接
,作
于点
,
,求证:
;
【延伸扩展】
(3)如图
,在(2)的条件下,连接
并延长
到点
,连接
,过点
作
,若
,
,求
的度数.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319ff9f648fedec284a11a9761cb6183.png)
【探究求证】
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fbe5a838bc505e9767b68ee4effd66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74dfb6a1b1bbdc001bc1b76cff7a285.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c015d99f2677951bdcd0447240ef93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9d6c52a8a30a5654fb6fc59f97d6ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c581b5a82a7c55dbdcb367a6b19a76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/220093b4faf76c63e1d19836ad2ec6a2.png)
【延伸扩展】
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f541f7ae7c39082d202efd28805c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2207a0c602ddeb38c1c3fdaab54cb1de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ef97e5dd23abbca383361b87467f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5702815555966e115b8ef2a2574fdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
更新时间:2024-05-15 19:23:24
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】已知直线
,点
,
分别在直线
,
上,点
为平面内一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/10/d73708cb-b63a-4d16-91c0-8d01ca1a18a2.png?resizew=452)
(1)如图1,请说明
;
(2)如图2,
,
平分
,
平分
,
,求
的度数:
(3)如图3,点
为
上一点,
,
,
交
于点
,请探究
,
,
之间的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/10/d73708cb-b63a-4d16-91c0-8d01ca1a18a2.png?resizew=452)
(1)如图1,请说明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec0aab44bde3a9b7e1f35f3848c2c0db.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9101e915136082998426bbdbec1e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/435f30095577dc714634354f5ad27715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2224bb7e017b4d687e1d4f70ce3cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec8012f09c7f5496c84f229ab769131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d034d287d9e7482e6521a50864f99643.png)
(3)如图3,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c93aa68bc891fdaeeba1465cc2a305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd095d32e687b92cac42c0366725cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7490de8be762971b33beca850b37b4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e00a45445a350af441eef0067b462dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e470b9b1ab6b8db7d19dc1e48ad6f09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923461581088e8444b579c1d9a01bb57.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】对于同一平面内以点O为端点的射线
与
,其中
,给出定义:
、
、……、
是
内或与射线
、
重合的n条不同的射线
,这些射线与射线
形成的不大于平角的角的大小分别为
、
、……、
、
,若这n个角满足
,则称这n条射线为
关于射线
的一个基准射线族,其中
为该基准射线族的基准角度.
(1)如图1,当射线
与射线
恰为
的两条三等分线时,判断射线
、
、
是否为
关于射线
的一个基准射线族?如果是,写出它的基准角度;如果不是,请说明理由;
(2)如图2,
的边
与射线
重合,固定射线
不动,将
以每秒
的速度绕着点O逆时针转动一周.当转动时间为
秒时,射线
、射线
、……、射线
是
关于射线
的一个基准射线族,该基准射线族的基准角度为
.
①当
时,直接写出
的取值范围;
②当n的最大值为6时,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b5d523373b8cbfa33e42a1bf154544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1652145a4785b50fa22fdd8c63f724b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ae18c3151ef1283fbd7854562fdfc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9123b1c8cb0bbaca44e8464bee03678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30f0c33581d65209dbb0aaff67f55b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943b765718479c160ba61ec5c6f8c5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e29bf5652f0d4f764c3606efcdb445f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b384e2fb553b2693d0ec39e16f591d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf9811e872dc8623fac91c19a19cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed32c92f255d3a1565a230d1bc2d4d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf9811e872dc8623fac91c19a19cf90.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/bad8f7e6-d8cd-41e7-86a1-824872619f3b.png?resizew=495)
(1)如图1,当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741a44528782580d24249e8075b8cd9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1652145a4785b50fa22fdd8c63f724b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ae18c3151ef1283fbd7854562fdfc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9123b1c8cb0bbaca44e8464bee03678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②当n的最大值为6时,直接写出t的取值范围.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图示,以正方形
的点
为坐标原点建立平面直角坐标系,其中线段
在
轴上,线段
在
轴上,其中正方形
的周长为24.
(1)直接写出
,
两点的坐标.
(2)若与
轴重合的直线
以每秒1个单位长度的速度由
轴向右平移,移动至与
所在的直线重合时停止.在移动过程中直线
与
、
交点分别为点
和点
.问:运动多长时间时,长方形
的周长与长方形
的周长之比为5:4.
(3)在(2)的条件下,若直线
上有一点
,连接
、
,恰好满足
.求出
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/607543bb9f55b8a141ed2d6cf0e1a20b.png)
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e01068f79fe668989d793891867b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabb6fe6ebd897196aa96aaedf4dc35d.png)
(3)在(2)的条件下,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a48e31deb78dadacc7e128ef3eb2a054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66e9eb7aa47a4f8d637aa9bf0259499.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/f7279893-0d25-4c45-9bfa-b7692d4e87bb.png?resizew=474)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知:
,
,E、G是
上的点,F、H是
上的点.
点作
交
延长线于点
,作
、
的角平分线交于点
,
交
于点
,求证:
;
(2)如图2,在(1)的条件下,作
的角平分线交
于点
,若
,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5188eea602f0d1a5a08da3fc421a076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f65e4fe6c59ccf167f7e0ab74abc76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603f2e71fce44005d73345f82494375b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7369f524ee35ee1f4694aca79f99816e.png)
(2)如图2,在(1)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53ec3f9aed38a23bab2b1d445cacc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8be1bd78207268bc34b4cdda97b0b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f3704336b5eb708cd6f822e3b455c9.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐3】已知:如图,
,直线
交
于点M,交
于点N,点E是线段
上一点,P,Q分别在射线
,
上,连接
,
,
平分
,
平分
.
时,直接写出
的度数;
(2)如图2,求
与
之间的数量关系,并说明理由;
(3)如图3,在(1)问的条件下,若
,过点P作
交
的延长线于点H,将
绕点N顺时针旋转,速度为每秒
,直线
旋转后的对应直线为
,同时将
绕点P逆时针旋转,速度为每秒
,
旋转后的对应三角形为
,当
首次与
重合时,整个运动停止.在此运动过程中,经过
秒后,
恰好平行于
的其中一条边,请直接写出所有满足条件的t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0a8cfb3747c454e0698e12857ffae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba6e1df63e02be9fcc4e027d2a0a6e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fd8ae390c2823c88f9d960ba6e99e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769284088573642b72b6fd62eb807b34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c32805e421aec6bce3624baa0c954f1.png)
(2)如图2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a298ed3325baafd125f688496fd52e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c32805e421aec6bce3624baa0c954f1.png)
(3)如图3,在(1)问的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6236fbcd4fbb4272e4076d3cf83bfa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e793d5df39fde7db97f079b6fd7bd3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb204f42d5fb6cd55050a18cca2804b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e8ac27d63ade4077fdcf7cf136cf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb098c40d2d014760c515096af48196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc60263aa0498b155f7f8640082360a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb098c40d2d014760c515096af48196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e39f0418fd7cd82ffe754e2c34fa2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e8ac27d63ade4077fdcf7cf136cf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16dca1f69db5d45d7e0195b60f546a40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e8ac27d63ade4077fdcf7cf136cf71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e39f0418fd7cd82ffe754e2c34fa2f8.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】已知
,点E在
上,点F在
上,点G在射线
上的一点.
如图1,试说明:
.(完成下面的填空部分)
证明:过点G作直线
,
∵
,
∴
.
∵
,
∴
.
∵
,
∴
.
∴
.
(2)【类比探究】
如图2,当点G在线段EF延长线上时,请写出
三者之间的数量关系,并说明理由;
(3)【应用拓展】
如图3,点E与点A重合,
平分
,且
,
,求
的度数.(本题的解答过程无需注明理由)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
如图1,试说明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e758277b8dd10d1ae128f6dd1102960.png)
证明:过点G作直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31307b00524e461b0ad8dfbcdf24bacf.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec08e5a3ac603813b03c82ba977f67e4.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31307b00524e461b0ad8dfbcdf24bacf.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdc93e7ee198aba41eea8d5502398db8.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdd44000416a39b2ccbc63cd1577191.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b7960538cb70fcf641b94864a90190d.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8b76fe139f0c743aed9570d528162fe.png)
(2)【类比探究】
如图2,当点G在线段EF延长线上时,请写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d68139f4e86db0f1ff42162c47b57f9.png)
(3)【应用拓展】
如图3,点E与点A重合,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52f31dac46d98b34afe54fa9cc085ee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a931054afc3db3fcf1141a4c19b6ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880948534bf7832fda8e826d480a8a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d9c1e0c3cab6b7bb3229221f4310ab0.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知点A,点
分别在线段
,
上,
.
,求证:
;
(2)分别过点A和点
作直线
、
使
,以点
为顶点的直角
绕点
旋转,并且
的两边分别与直线
,
交于点
和点
,如图
试判断
、
之间的数量关系,并说明理由;
(3)在(2)的条件下,若
和
恰好分别平分
和
,并且
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f19f085f2901aef62719cb8df1781dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966a7257fd3af3a4049844773c611e26.png)
(2)分别过点A和点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5715c18d366125d2ea34eed5623e982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc32e15378120a26376e347b764f864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc32e15378120a26376e347b764f864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7d1a478f313c3280060ab38cc8b9e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50cf5d8784e1c3f5132a7915010c1be5.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a91f89a0bc06bd1613e4ec4011e6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e0b796ca8d0194461f1d23e606bf58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7d1a478f313c3280060ab38cc8b9e2.png)
您最近一年使用:0次