如图,
,
∠BAD
(1)在AC上方求作求作一点E,使得△ACE∽△ABD(要求:尺规作图,保留作图痕迹,不写作法)
(2)在(1)的条件下,连接DE,若
,
,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef95ebb3e3e81f72c609203f0a046a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1cf0ae3ce752f851cceca482cbec31.png)
(1)在AC上方求作求作一点E,使得△ACE∽△ABD(要求:尺规作图,保留作图痕迹,不写作法)
(2)在(1)的条件下,连接DE,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585412bde1d2c7b297beaa78fd991130.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3565c0b0d72f4095aeeec3d02bc25692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ef95ebb3e3e81f72c609203f0a046a4.png)
![](https://img.xkw.com/dksih/QBM/2021/5/14/2720455184334848/2724444471181312/STEM/06f0a5ee821241998d487b7e42924780.png?resizew=144)
更新时间:2021-05-19 15:19:22
|
相似题推荐
解答题-作图题
|
适中
(0.65)
【推荐1】尺规作图(保留作图痕迹,不写作法)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/1bcf5abc-842e-4728-9960-443b05f43029.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/c8dd6b86-f818-487b-a6a2-12adf147666c.png?resizew=199)
(1)如图1,已知∠AOB,作出∠AOB的对称轴a;
(2)如图2,已知四边形ABCD,
,
,作出四边形ABCD的对称轴b.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/1bcf5abc-842e-4728-9960-443b05f43029.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/17/c8dd6b86-f818-487b-a6a2-12adf147666c.png?resizew=199)
(1)如图1,已知∠AOB,作出∠AOB的对称轴a;
(2)如图2,已知四边形ABCD,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4354365ca0929f8a606ed0bf341e4ca.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
名校
【推荐2】如图,四边形
是平行四边形.
的角平分线
,交
于点E;在线段
上截取.
,连接
;(不写作法,保留作图痕迹)
(2)在(2)所作图中,证明四边形
是菱形.请完成下面的填空,补全证明过程.
证明:∵四边形
是平行四边形,
∴ ①
∴
,
∵
平分
,
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bb6eb5554f82a9031eb649a212af72.png)
∴
②
∴
③
,
,
又∵
,
∴四边形
是 ④ ,
∵
,
∴四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6961ff0c507e6c21ee3af44e887c8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)在(2)所作图中,证明四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
证明:∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴ ①
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8289b804775f99d4e883697ed90c3a.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06bb6eb5554f82a9031eb649a212af72.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d63783f365e666ace307cadcaba60fa.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b4d998ee9f627fccb48171d00e44c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475b4502140ea9bcdda0c9c0eff6481f.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf7dc43a39738e3e2a0b819be505c6e.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1cba730226f8996e86127ff643ce63.png)
∴四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,点E是矩形
的边
延长线上一点,连接
交
于点G,作
交
于点F,
.
是菱形;
(2)若
,求
的长;
(3)在(2)的条件下,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f42eb140a8606852b6255088f9ff30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff65d3a322a14f087ff1bb1f5b12a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d831c9ba6d18774540e2aaa29132fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/413a0bc25dcd414e41832d970aec5dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)在(2)的条件下,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,
中,
是
的直径,
为弦
的中点,连接
并延长交
于点
,连接
交
于点
,延长
至点
,使得
,连接
.
![](https://img.xkw.com/dksih/QBM/2020/8/9/2524337381703680/2526439354458112/STEM/b02137fe3dbc4b839546ce55e0ec4967.png?resizew=184)
(1)求证:
是
的切线;
(2)
的半径为
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd665544b51c659dca956ed3a970ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/8/9/2524337381703680/2526439354458112/STEM/b02137fe3dbc4b839546ce55e0ec4967.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d1f14871d90e2bf98a8cf740515ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
您最近一年使用:0次