如图,在菱形ABCD中,对角线
相交于点M,已知
,点E在射线
上,
,点P从点B出发,以每秒
个单位的速度沿BD方向向终点D匀速运动,过点
作
交射线
于点
,以
为邻边构造平行四边形
,设点
的运动时间为
;
![](https://img.xkw.com/dksih/QBM/2020/5/23/2468982440222720/2469575257997312/STEM/131f589bb4274edeb864dcfb5e890b0d.png?resizew=435)
(1)
;
(2)求点
落在
上时
的值;
(3)求平行四边形
与
重叠部分面积S与
之间的函数关系式;
(4)连接平行四边形
的对角线
,设
与
交于点
,连接
,当
与
的边平行(不重合)或垂直时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5e19462cc3bc927aa1bcdc09ac4fcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261078c9b3543f146ced2d60efaecbfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa154ac33703b5c836047b2143697c6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0917d2574684fbdc9d64fcc82ec303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ebd1d359040a1172a944ded96ed0127.png)
![](https://img.xkw.com/dksih/QBM/2020/5/23/2468982440222720/2469575257997312/STEM/131f589bb4274edeb864dcfb5e890b0d.png?resizew=435)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db585c90343dd6d8fa9068c92f7b225.png)
(2)求点
![](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/36a1b09c653185842513e24ebba60bb3.png)
(3)求平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0917d2574684fbdc9d64fcc82ec303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)连接平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0917d2574684fbdc9d64fcc82ec303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
更新时间:2020-05-24 13:06:38
|
相似题推荐
解答题-证明题
|
困难
(0.15)
名校
【推荐1】已知,正方形ABCD中,M、N分别为AD边上的两点,连接BM、CN并延长交于一点H,连接AH,E为BM上一点,连接AE、CE,∠ECH+∠MNH=90°.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953199450644480/2957357688045568/STEM/1d4dc556-849a-4f1e-a220-ef5a9957efe2.png?resizew=467)
(1)如图1,若E为BM的中点,且DM=3AM,
,求线段AB的长.
(2)如图2,若点F为BE中点,点G为CF延长线上一点,且EG//BC,CE=GE,求证:
.
(3)如图3,在(1)的条件下,点P为线段AD上一动点,连接BP,作CQ⊥BP于Q,将△BCQ沿BC翻折得到△BCl,点K、R分别为线段BC、Bl上两点,且BI=3RI,BC=4BK,连接CR、IK交于点T,连接BT,直接写出△BCT面积的最大值.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953199450644480/2957357688045568/STEM/1d4dc556-849a-4f1e-a220-ef5a9957efe2.png?resizew=467)
(1)如图1,若E为BM的中点,且DM=3AM,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8447a38333123df7214f2f6795ce2c9f.png)
(2)如图2,若点F为BE中点,点G为CF延长线上一点,且EG//BC,CE=GE,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5363d8bc377b457e9e959e79ed8cd07c.png)
(3)如图3,在(1)的条件下,点P为线段AD上一动点,连接BP,作CQ⊥BP于Q,将△BCQ沿BC翻折得到△BCl,点K、R分别为线段BC、Bl上两点,且BI=3RI,BC=4BK,连接CR、IK交于点T,连接BT,直接写出△BCT面积的最大值.
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】如图.在矩形ABCD中.
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/6d36f99d-4099-4e68-8f1f-4f0a84da4c4f.png?resizew=439)
(1)如图1.点M、N分别为边BC、CD上的点,
且
.求DN的长;
(2)如图2,
的平分线交CD的延长线于Q,交AD于P.点O为PQ的中点,求
的度数;
(3)如图3.点E为边AB的中点,点F、G、H分别是边BC、CD、AD上的动点.则四边形EFGH周长的最小值为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/24/6d36f99d-4099-4e68-8f1f-4f0a84da4c4f.png?resizew=439)
(1)如图1.点M、N分别为边BC、CD上的点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f721340387f17c4331a5f07a97f7025a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965f4956928390099975a610bd0d8514.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a037c23a11c7783b1b44988c21634f.png)
(3)如图3.点E为边AB的中点,点F、G、H分别是边BC、CD、AD上的动点.则四边形EFGH周长的最小值为______.
您最近一年使用:0次
【推荐1】在等边三角形
中,点D为
上一点,连接
,将
绕D逆时针旋转角度
得到
,连接
,已知
,
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/11a56869-1cd9-4692-b4d6-a5e0c0633076.png?resizew=635)
(1)如图1,若
,
,连接
,求
的长;
(2)如图2,若
,分别取
的中点H,
的中点F,连接
,
,求证:
;
(3)如图3,若
,P为
上一点,且满足
,连接
,将
沿着
所在直线翻折得到
,连接
,当
最大时,直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8944bb1af77920b5018eebf3af16b2b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/11a56869-1cd9-4692-b4d6-a5e0c0633076.png?resizew=635)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66f13ba07392e91d962125a39025927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03f73bec20b60bc7608972607f5a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b95463a97c60db3250cb641bf6523d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c112e3f55e4f8a62c7f361e105504db9.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b96bd6556f8b3f1f6f331d24e8283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ae354da16d48338d96d47e5f03bfe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c733c8bb6ee8666dc5477d5fb8c6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2a2bd5c26ae3a09fe885705128cac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2a2bd5c26ae3a09fe885705128cac4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3cd61d00f89e68ccca2cac5c937783.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知抛物线
与直线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/20df0ed1-b361-4bdb-a346-522fb39a2714.png?resizew=356)
(1)如图1,若抛物线C与直线l只有一个交点A.
①求点A的坐标;(用含a的代数式表示)
②连接点A与点
交抛物线C于另一点B,求
的值.
(2)如图2,若抛物线C与直线l交于D,B两点(点D在点E左侧),连接
,当
时,判断a与b的积是否为定值若是,求出该定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bde8a12369d468593dceb7d805ae578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3776d9948511aa3149e9ac1faabf700c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/18/20df0ed1-b361-4bdb-a346-522fb39a2714.png?resizew=356)
(1)如图1,若抛物线C与直线l只有一个交点A.
①求点A的坐标;(用含a的代数式表示)
②连接点A与点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/409656f93b3e9803b68446fa6b839853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc3f93ceb05f20799a28a6aa99cab44.png)
(2)如图2,若抛物线C与直线l交于D,B两点(点D在点E左侧),连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92574df7bd90ee17a4834a608e0179e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8e171ac85cbccc8223a0cb5bc8bde3.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】如图,
中,
,
,
,点
为射线
上的动点,以
为边,在
的同侧作菱形
,使得
.若菱形
的边
经过线段
的中点
.
(1)将菱形
沿射线
向右平移,记平移中的菱形
菱形
,当点
与点
重合时停止平移.设平移的距离为
,是否存在这样的
,使△BDE是等腰三角形?若存在,求出
的值;若不存在,请说明理由.
(2)在(1)问的平移过程中,设菱形
与
重叠部分的面积为
,请直接写出
与
之间的函数关系式以及自变量
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b94b33e979c7696cf07859bfebcde48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f769d040ba926b022c56960e1b2677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4997da49b3dfe98144ad13aed0d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d7ad3d0bec4064d5484f71ed105cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)将菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aba2064ce4534d4318e3a1ddc5a1258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e210795a966bd5dc1293479ab1988b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)在(1)问的平移过程中,设菱形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aba2064ce4534d4318e3a1ddc5a1258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/ba816067-1215-4750-bf40-f08efdad6360.png?resizew=123)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐2】在平面直角坐标系中,抛物线
分别交
轴于A、
两点,交
轴于点
,点A的坐标为
,点
的坐标为
.
(2)如图1,点
、点
分别在第一、第二象限内的抛物线上,
轴于点
,点
在第四象限内,连接
交
轴于点
,连接
、
,
且
,若点
的横坐标为
,点
的横坐标为
,
,求
与
之间的函数关系式(不要求写出自变量的取值范围);
(3)如图2,在(2)的条件下,点
在线段
上,连接
,作
平分
交线段
于点
,连接
,若
与
的度数比为
,
,求
点的纵坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c22804f52986009170586c673342d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2a5e336b6bcba6354fd366c892dd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f00d0ff8dd38da17167cf9b789eec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8db072e2b6104671b82f948012fb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a175eff2a2aaaca83e0d55be4ce1ebd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3afd71f23a7622b3e99487a8c86d9379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52509a9702e993b4398a4ca74bcb4fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图2,在(2)的条件下,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316056f6e656a8be4a589c78d500c86c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d0c19eec98f184ad306a1b09127b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b773bfd5555285484e48c83f6e4fa13f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4806fb7f95f63e863c287faa51f8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5dff17dd549a8c9b45b4868ef166a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
【推荐3】阅读理解:如图1,AB和BC是⊙O的两条弦(即折线ABC是圆的一条折弦),BC>AB,点M是弧ABC的中点,则从点M向BC所作垂线的垂足D是折弦ABC的中点,即CD=AB+BD.
下面是运用“截长法”证明CD=AB+BD的部分证明过程.
证明:如图2,在CB上截取CG=AB,连接MA,MB,MC和MG.
∵M是弧ABC的中点,∴MA=MC.
任务:
(1)请按照上面的证明思路,写出该证明的剩余部分;
(2)如图3,已知等腰△ABC内接于⊙O,AB=AC=4,BC=3,点D为弧AC上一点,∠ABD=60° ,AE⊥BD与点E,求△BDC的周长.
下面是运用“截长法”证明CD=AB+BD的部分证明过程.
证明:如图2,在CB上截取CG=AB,连接MA,MB,MC和MG.
∵M是弧ABC的中点,∴MA=MC.
任务:
(1)请按照上面的证明思路,写出该证明的剩余部分;
(2)如图3,已知等腰△ABC内接于⊙O,AB=AC=4,BC=3,点D为弧AC上一点,∠ABD=60° ,AE⊥BD与点E,求△BDC的周长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/c5c2f0b8-b7d0-4778-83ab-404fd7c6daec.png?resizew=423)
您最近一年使用:0次