1 . 如图,
是半圆
的直径,点
为半圆
外一点,
分别交半圆
于点
.若
,
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240ea67c239b0d9213448c11cba18c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fc6a5e71fa379d613ac1ef1cdf1048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be41b05e11ba5eadaaed9a224b949774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2017/2/4/1619478440148992/1619478440919040/STEM/78f1fd1b309d4f729bdac06af6e8842b.png)
您最近一年使用:0次
2 . 已知直角三角形周长为
,一锐角平分线分对边为3:5两部分.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442fce668d789c1019394a11ffa6450.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
您最近一年使用:0次
3 . 选修4-1:几何证明选讲
等腰梯形
中,
,
交于点
,
平分
,
为梯形
外接圆的切线,交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/11/12/1573144670306304/1573144676483072/STEM/ad60bfc1b8d54caf9dc22fd4a87cd286.png)
(I)求证:
;
(II)若
,
,
,求
的长.
等腰梯形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aed74d65e981fbfddc940923b5c91b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90be2908153fa6e4d84afe7d4c955e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/11/12/1573144670306304/1573144676483072/STEM/ad60bfc1b8d54caf9dc22fd4a87cd286.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4f39e61059fb69457616c166702657.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2ee4d985e634e127a8db9fae7ab837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
您最近一年使用:0次
4 . 选修4-1:几何证明选讲
如图,圆
是
的外接圆,
是
的中点,
交
于
.
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573101706616832/1573101712711680/STEM/da5dea06400c4783b9c5f7d2caf7482a.png)
(Ⅰ)求证:
;
(Ⅱ)若
,点
到
的距离等于点
到
的距离的一半,求圆
的半径
.
如图,圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2333da32638ec636fa1e69e750ca4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e262f59351803e420bf1226c95e4bba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/10/31/1573101706616832/1573101712711680/STEM/da5dea06400c4783b9c5f7d2caf7482a.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c785dd3acc900f2df19930dcb0b816c.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73c03338db66b081700f70bcf9a0989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
您最近一年使用:0次
2016-12-04更新
|
146次组卷
|
2卷引用:2017届湖南永州市高三高考一模考试数学(理)试卷
5 . 选修4-1:几何证明选讲
如图,在
中,
,以
为直径的圆交
于点
,过点
作圆
的切线交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/10/25/1573094484230144/1573094490759168/STEM/5de5fb100dd94cbd9c5021632656ede4.png)
(1)求证:
;
(2)若
,求
的大小.
如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c38d26d85081a99d51e2f686817e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/10/25/1573094484230144/1573094490759168/STEM/5de5fb100dd94cbd9c5021632656ede4.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee170c82e3dc624dc3016443496a469.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748aa3c2514e68c3ec55e48f4caa81f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5955fb3e36aab3514e1d23e747312a4b.png)
您最近一年使用:0次
2016-12-04更新
|
179次组卷
|
2卷引用:2017届重庆市第八中学高三理上适应性考试一数学试卷
6 . 选修4-1:几何证明选讲
如图,点
是圆
直径
的延长线上一点,
是圆
的切线,
为切点,
的平分线
与
相交于点
,与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
的度数;
(2)若
,证明:
.
如图,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/12/8/1579046393077760/1579046393839616/STEM/c84ed3e0c6d9438bbf925b51ab7c0ea1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbb28736e2f6d739a732a2a0a20cabc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12826d3f5dd6c54aaab317faad297c2a.png)
您最近一年使用:0次
2016-12-04更新
|
344次组卷
|
2卷引用:2017届三省高三上学期百校大联考数学(理)试卷
7 . 选修4-1:几何证明选讲.
如图
是圆
的一条弦,过点
作圆的切线
,作
,与该圆交于点
,若
,
.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573025500635136/1573025506861056/STEM/36ef016aad6e4e0c867c34a9f4a60800.png)
(1)求圆
的半径;
(2)若点
为
中点,求证
三点共线.
如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759f49569f2079bc4df67f06a32eb8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573025500635136/1573025506861056/STEM/36ef016aad6e4e0c867c34a9f4a60800.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b07ea040f925308c31116cf77c113a.png)
您最近一年使用:0次
8 . 选修4-1:几何证明选讲
如图,四边形
外接于圆,
是圆周角
的角平分线,过点
的切线与
延长线交于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573015911538688/1573015918010368/STEM/e40e8d2e5f3446c2aeb156a47188a259.png)
(1)求证:
;
(2)若
是圆的直径,
,求
的长.
如图,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd777f9452cb8b56d8a0d3b07d15c19f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/9/12/1573015911538688/1573015918010368/STEM/e40e8d2e5f3446c2aeb156a47188a259.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73c8a92b36b72cc4441fd0a9013f841.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f03dab955d3953261e1f3f437f6128f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
9 . 选修4-1:几何证明选讲
如图,
为
的直径,过点
作
的切线
交
于点
的延长线交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/12/22/1619402851647488/1619402852311040/STEM/4b8c1e8cfa464e90995e6a12224c36a1.png)
(1)求证:
;
(2)若
,求
和
的长.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eab767f07893891de2f6558d45e9b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b07f3700c45a84b02f153ea0fb20b4bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2016/12/22/1619402851647488/1619402852311040/STEM/4b8c1e8cfa464e90995e6a12224c36a1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/283c87427f4af230ba9e20ba9446a922.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd2c6dbd4815508d9480ed15277fe5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
10 . 选修4-1:几何证明选讲
如图,割线
交圆
于
、
两点,
交圆
于
,
在
上,且满足
.
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573166646697984/1573166653333504/STEM/79a3f68449234b168621f938794884b1.png)
(1)求证:
;
(2)若
,求
的长.
如图,割线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931fa192c11e576022354aa86ee366bd.png)
![](https://img.xkw.com/dksih/QBM/2016/11/22/1573166646697984/1573166653333504/STEM/79a3f68449234b168621f938794884b1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1175ffd874187d06cb94c61f894b61d7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e43ad0c6e1ff1454686d89b3769af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
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