如图,∠MON=90°,点A,B分别在OM,ON上,作∠MON的平分线OP,作线段AB的垂直平分线,分别与OP,AB相交于C,D;连接AC,BC.
(1)补全图形;
(2)求证:AC⊥BC.
(1)补全图形;
(2)求证:AC⊥BC.
![](https://img.xkw.com/dksih/QBM/2021/8/11/2783638586556416/2785916324061184/STEM/2b60fab2-12a9-4c49-93c5-48e288158909.png)
更新时间:2021-08-14 11:44:10
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解答题-证明题
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适中
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【推荐1】已知
,
,
,垂足分别为E,F,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/720ec3c0-53a3-4a8d-83b8-6422a4e60039.png?resizew=470)
(1)如图1,求证:
;
(2)如图2,连接AD交BC于点G,请直接写出图2中以点G为一个端点的相等线段.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3f5dc11efe60b4fd9a13b1d6b83842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d276d0010fd458383ea3dd61415e1aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c55ee522f41c43253050e92b3c8de31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/29/720ec3c0-53a3-4a8d-83b8-6422a4e60039.png?resizew=470)
(1)如图1,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
(2)如图2,连接AD交BC于点G,请直接写出图2中以点G为一个端点的相等线段.
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名校
【推荐2】如图,
于E,
于F,若
、
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/186bd22b-bbe2-4979-9151-a57d3686e8cc.png?resizew=189)
(1)求证:
;
(2)已知
,
,求AB的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74790a3e99cbc484dd4e92f2aa056f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2dbcb9aba9056d7c82894342374a253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ea6d39197c8f7159c37644f2f0fc78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e9b7b9f03c429f0ef16c3732ad9afd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/186bd22b-bbe2-4979-9151-a57d3686e8cc.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b31437017a5cc0015ba4a1f5b3cc9f5.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565f5ccfc4dbebd3d496c620503ccc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d9a53b2803588d25a4d1a81db555cc.png)
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【推荐1】在
中,∠BAC=90°,AB=AC,点P为AC上一点,点M为BC上一点,线段AM,BP交于点E.
(1)如图1,若BP为
的角平分线,且AM⊥BC,求证:AE=AP.
(2)如图2,若BP为
的角平分线,且AM⊥BP,求证:AP=PM.
(3)如图3,若BP为
的中线,且AM⊥BP,求证:BP=AM+MP.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)如图1,若BP为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)如图2,若BP为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图3,若BP为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/d9cfd5a4-5125-493a-a848-1b6367e5e288.png?resizew=528)
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【推荐2】如图,
的
外角的平分线
与
的外角的平分线
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/4029198d-769f-4339-ae96-68c5a8710dee.png?resizew=142)
(1)若
,求
的度数;
(2)求证:点
到三边
,
,
所在直线的距离相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/4029198d-769f-4339-ae96-68c5a8710dee.png?resizew=142)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5840e0454fdec7d2158072c43b8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0433f8116768b42642a7f7e5977ce6.png)
(2)求证: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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
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【推荐1】如图,在
中,
垂直平分
,交
于点
,交
于点
,D是
的中点,连接
,
,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a277db452e76240ec83ec6a2864bdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc1444dfb2fa820f1bb367c95dfe88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/5534773e-16e5-4d2c-86e4-1b24780a6d3b.png?resizew=176)
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【推荐2】如图,平行四边形ABCD的对角线AC,BD相交于点O,AB⊥AC,AB=6cm,BC=10cm,点P从点A出发,沿AD方向以每秒1cm的速度向终点D运动,连接PO,并延长交BC于点Q.设点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938218057326592/2941987673554944/STEM/48fc7917-9b9e-437a-a1d4-b05949368697.png?resizew=240)
(1)求BQ的长(用含t的代数式表示);
(2)当四边形ABQP是平行四边形时,求t的值;
(3)当
时,点O是否在线段AP的垂直平分线上?请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938218057326592/2941987673554944/STEM/48fc7917-9b9e-437a-a1d4-b05949368697.png?resizew=240)
(1)求BQ的长(用含t的代数式表示);
(2)当四边形ABQP是平行四边形时,求t的值;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a33590f63df8adfbe96c6430487c826.png)
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【推荐1】(1)如图①所示,在
中,
,
分别平分
和
,试探究
与
的数量关系(直接写出结论).
(2)②示,在四边形
中,
,
分别平分
和
,试探究
与
的数量关系(写出说理过程).
(3)若将(2)中的四边形
改为六边形
(如图③所示),请直接写出
与
的数量关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)②示,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727ad3e630a224303d6d3b8ad5c114ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8cae4c78e63ccc3ae5ad336d4b2959.png)
(3)若将(2)中的四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764ed37dbcad7400fd7735b626f26164.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/05e1ef17-90f8-42dc-970a-c0e01bb765d8.png?resizew=394)
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【推荐2】如图,点P在正方形ABCD的对角线AC上,点E在边BC上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/133d5eb6-05ec-465e-95a4-6374abf461a9.png?resizew=129)
(1)求证:
;
(2)连接DE,试探究
的形状,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa4144f6ce108867d237f6891b4f4954.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/24/133d5eb6-05ec-465e-95a4-6374abf461a9.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bfc6b5683ec1919f8257765ce056b7.png)
(2)连接DE,试探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
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