已知,
内接于
,弦
交
于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963579275460608/2966637436813312/STEM/c9919ede-e13a-412a-907a-45329163ad7f.png?resizew=638)
(1)如图1,求证:
;
(2)如图2,连接
,点
为
的中点,连接
,点
在
上,过点
的弦
,交
于点
,若
,求证:
;
(3)如图3,在(2)的条件下,弦
交
于点
,连接
,若
,
,
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64bb60aa0f3a3d4ec8e51cf5770b191.png)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963579275460608/2966637436813312/STEM/c9919ede-e13a-412a-907a-45329163ad7f.png?resizew=638)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)如图2,连接
![](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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd8efdea1208554b4fc5bc390a452dd.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/9a429c1f0736d458f04d42a8919d4f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
(3)如图3,在(2)的条件下,弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a16c4704582cea77e9e824a5a2cd161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e89bd09073f85fab07ccf0560f3478b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2022-04-26 19:42:13
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知,
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/2a61a12d-3407-42f5-b460-6aa965944cdb.png?resizew=490)
(1)如图1,若
,点
是
边上的中点,求
的面积;
(2)如图2,若
是
的角平分线,求证:
;
(3)如图3,若
、
是
边上两点,且
,
,交
、
于
、
,连接
、
,猜想
与
的大小关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/2a61a12d-3407-42f5-b460-6aa965944cdb.png?resizew=490)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.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/661ff55b5ebbadfb600989af3cfce2fd.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d55569d5ba8bf91262a1ee7c1d2a52.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/d42218a68301d770accaaefb96b19f8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39b13d187b25461d85a3b8d10c7b678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/868ff1350bd72625328c85c3097cd85e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b0b831b56c1a03925d0f5a332d8ded.png)
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【推荐2】点E在正方形ABCD的边BC上,点F在AE上,连接FB,FD,∠ABF=∠AFB.
(1)如图1,求证:∠AFD=∠ADF;
(2)如图2,过点F作垂线交AB于G,交DC的延长线于H,求证:DH=2 AG;
(3)在(2)的条件下,若EF=2,CH=3,求EC的长.
(1)如图1,求证:∠AFD=∠ADF;
(2)如图2,过点F作垂线交AB于G,交DC的延长线于H,求证:DH=2 AG;
(3)在(2)的条件下,若EF=2,CH=3,求EC的长.
![](https://img.xkw.com/dksih/QBM/2020/11/3/2584956418506752/2589883637612544/STEM/4cfdf804176f401c900e36d48beffe2d.png?resizew=421)
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【推荐1】如图,AB是⊙O的直径,C为⊙O上一点,M是半径OB上动点(不与O、B重合),过点M作EM⊥AB,交BC于点D,交AC的延长线于点E,点F为ED的中点,连接FC.
(1)求证:FC为⊙O的切线;
(2)当M为OB的中点时,若CE=8,CF=5,求⊙O的半径长.
(1)求证:FC为⊙O的切线;
(2)当M为OB的中点时,若CE=8,CF=5,求⊙O的半径长.
![](https://img.xkw.com/dksih/QBM/2021/4/7/2694516776640512/2697718237134848/STEM/f87f5970-149f-475b-8626-b3f16655f757.png)
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【推荐2】在
中,
,
,将
沿BC方向平移得到
,A,C的对应点分别是D,E,连接BD交AC于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/b5665ef2-474f-4d4b-a1f0-5b0d001f7455.png?resizew=356)
(1)如图1,将直线BD绕点B顺时针旋转,与AC,DC,DE分别相交于点I,F,G,过点C作
//
交DE于点H.
①求证:
;
②若
,求DG的长.
(2)如图2,将直线BD绕点O逆时针旋转
(
),与线段AD,BC分别交于点P,Q,在旋转过程中,四边形
的面积是否发生变化?若不变,求出四边形
的面积,若变化,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0acc93490a6a784eb62201d93dd93d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/b5665ef2-474f-4d4b-a1f0-5b0d001f7455.png?resizew=356)
(1)如图1,将直线BD绕点B顺时针旋转,与AC,DC,DE分别相交于点I,F,G,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3747ef4f089cc3804a2e310e80a6c908.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d390df2733a81db86f0556dba8af0f.png)
(2)如图2,将直线BD绕点O逆时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480888079e87df2b1c0734114a594d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe83f1ae7e5f05d8bed6bf6f42db0e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe83f1ae7e5f05d8bed6bf6f42db0e7d.png)
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真题
【推荐1】如图,抛物线
交y轴于点
,并经过点
,过点A作
轴交抛物线于点B,抛物线的对称轴为直线
,D点的坐标为
,连接
,
,
.点E从A点出发,以每秒
个单位长度的速度沿着射线
运动,设点E的运动时间为m秒,过点E作
于F,以
为对角线作正方形
.
(2)当点G随着E点运动到达
上时,求此时m的值和点G的坐标;
(3)在运动的过程中,是否存在以B,G,C和平面内的另一点为顶点的四边形是矩形,如果存在,直接写出点G的坐标,如果不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c87b7e39ab4c173e357d92f345ddab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c9f25703e265026af2d481e64414d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2ea84cba8ccd585ad1da1fd204bc3e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
(2)当点G随着E点运动到达
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)在运动的过程中,是否存在以B,G,C和平面内的另一点为顶点的四边形是矩形,如果存在,直接写出点G的坐标,如果不存在,请说明理由.
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名校
解题方法
【推荐2】综合与实践:
如图1,
中,
,
于点
,
且
;如图2,在图1的基础上,动点
从点
出发以每秒
的速度沿线段
向点
运动,同时动点
从点
出发以相同速度沿线段
向点
运动,当其中一点到达终点时另外一点也随之停止运动,设点
运动的时间为
秒.
(1)求
的长;
(2)当
的其中一边与
平行时(
与
不重合),求
的值;
(3)点
在线段
上运动的过程中,是否存在以
为腰的
是等腰三角形?若存在,求出
的值;若不存在,请说明理由.
如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b1366c5cef840fdcd88a0994daee04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e9ce805b4864002d81d390e262bd75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2713679aa5f12e1d89d3a3d98b65212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a138fefcb02cc063b48967c0fc9d28f8.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/5b3144cc-4674-493d-8061-398b7c9471b0.jpg?resizew=139)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/76666ced-7e87-4d20-a8bb-5096a7815004.jpg?resizew=139)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/80e01f1a-6308-49b0-8473-78599524d83d.jpg?resizew=139)
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【推荐1】如图,
的半径为5,
是
的直径,弦
于点F,
,P是
上一点,连接
交
于点E,连接
交
于点G,
的延长线与
的延长线交于点Q.
,求证:
;
(2)在(1)的条件下,求线段
的长;
(3)如果
,求
的面积.
![](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/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682c416aeea1d4d3bf2a4b128a60e3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6f9353ca110c8b81561455b232dbc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca08cdea0d1da2945dcc8a9d8feb0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f163ea5d347198d0afe7f66f5d28849.png)
(2)在(1)的条件下,求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a7730d36021f3e894234b81e4e9a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】【问题提出】
(1)如图①,四边形
内接于
,若
,则
的度数为 ;
【问题探究】
(2)如图②,在锐角
中,
是
边上的高,
是
的中线,
.若
,求
的长;
【问题解决】
(3)如图③,现有一块四边形梯田
米,
米,
米,
为
上的一个取水点,且
米,
为两条灌溉水渠,为方便观察梯田灌溉情况,工作人员计划在水渠
上找一点
,沿
修一条小路,并要求
.工作人员按照如下方法操作:
,为圆心,适当长为半径画弧交
于点
;
②分别以点
为圆心,大于
的长为半径画弧,两弧交于点
;
③连接
交
于点
.
按照上述方法操作,找到的点
位置是否符合要求?若符合要求,请求出此时小路
的长;若不符合要求,请说明理由.
(1)如图①,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547f06a2c65384969448436c18197eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
【问题探究】
(2)如图②,在锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886955b212ab1b9e4eb8305b66a25325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178076b5090aa80570a760f3c2afa5cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【问题解决】
(3)如图③,现有一块四边形梯田
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91343e111fc5adc3a98397eb0a96cc06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5afd2e46dc1d99287e05ef084b988c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a1da04a39c44b276cc322b9abc8d778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddd412e1413f2e2b15ba926f7be29a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2e8ca19f8235ef54a775ae5724b14c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3692cbeb579e58fef5217b2637b9cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b35717a6d8edc025dfc5385ebd1e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
②分别以点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94e1ca12da27075e5241b7c7ce74672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
③连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
按照上述方法操作,找到的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
您最近一年使用:0次