在
中,
是
边上的点(不与
重合),连接
.
(1)如图1,当点
是
边的中点时,
______________;
(2)如图2,
是
的垂直平分线,
的周长为15,求
的周长;
(3)如图3,
是
的角平分线,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6b93dbe5272a5167ff4e2918bec864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/30/5efceb5e-4a1f-434f-931b-772649fd5b83.png?resizew=468)
(1)如图1,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d65d49d51b0a641d0a11667d602d4e.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/855a2986850258d9c7d0cd583fa79d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77211f1ebca66c78821180b54b914bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2e56af0d14a3a401ac6824d9c748b4.png)
更新时间:2023-07-29 18:05:48
|
相似题推荐
解答题-问答题
|
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【推荐2】等面积法是一种常用的、重要的数学解决问题的方法.请尝试利用这种数学方法解决下面问题:在
中,
.
(1)如图①,
,求
的面积及
的长;
(2)如图②、点D、点P分别在边
上,将
沿着
折叠(
为折痕),使点A和点B重合,
,求
的面积;
(3)在(2)的条件下,作
,垂足分别为点E、点F,则
,求
(或
)的长;
(4)如图③,点P在边
上,且
,点Q是边
上一点(不与点A、点B重合)
,垂足分别为点E、点F.直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7182014744028f2ab7ce4f19729b903b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/da02c69f-87eb-4c02-a2b9-a3a35eef0a24.jpg?resizew=445)
(1)如图①,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)如图②、点D、点P分别在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d73bcade5cc069fb1f596253f577af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
(3)在(2)的条件下,作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31e6b78a97558bf1e42c992defd508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
(4)如图③,点P在边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a606499df4459e5fbd6021c61a805359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6635b5082b4dd73db7759bb19778f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec27d7a986f19349ac7b73564aa09a49.png)
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解答题-作图题
|
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【推荐1】如图,在
中,
是
的中线,利用尺规作图法在
上求作一点E,连接
,使得
.(不写作法,保留作图痕迹)
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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您最近一年使用:0次
解答题-作图题
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(0.85)
【推荐2】如图,由边长为1的小正方形构成的网格中,每个小正方形的顶点叫做格点,△ABC的顶点在格点上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/d51a2535-afe5-4f39-af43-c114f644b4bc.png?resizew=371)
请用无刻度尺按要求作图:
(1)作△ABC的高AH;
(2)①找一格点D使AD⊥AC且AD=AC;
②连接CD,在CD上画出一点F,连AF,使AF将四边形ABCD的面积平分.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/28/d51a2535-afe5-4f39-af43-c114f644b4bc.png?resizew=371)
请用无刻度尺按要求作图:
(1)作△ABC的高AH;
(2)①找一格点D使AD⊥AC且AD=AC;
②连接CD,在CD上画出一点F,连AF,使AF将四边形ABCD的面积平分.
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐1】如图,在
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd35f055165577f901117038a8cc609.png)
(1)尺规作图:在
边上求作点Q,使得点Q到边
的距离等于
的长.(保留作图痕迹,不写作法);
(2)在(1)的条件下,连接
交
于点P,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bd35f055165577f901117038a8cc609.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/48f540b8-a1ad-475e-981c-17da4eb44161.png?resizew=130)
(1)尺规作图:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeda11c9479d2b1b169bafd122522558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
您最近一年使用:0次
解答题-问答题
|
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【推荐2】如图,直线
相交于点
,
.
(1)已知
,求
的度数;
(2)如果
是
的平分线,那么
是
的平分线吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5192c1f93b14a7df922774971bdfb2b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f922998061c0b43f479413f4778e02fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/13/77c8680c-644d-4100-aa32-f361a75685cc.png?resizew=201)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861ff889e56a153b4df52bd313ab7ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09bf6ba623953df55eb869b2b363e39.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/418ebb89d29f4f631b055c911e8d178a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778d3556c2454a733a15629af5c2444f.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】如图,
中,
,
垂直平分
,交
于点F,交
于点E,且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/79dfd7ef-edf1-49ad-a628-116e7181f3ac.png?resizew=176)
(1)若
,求
的度数;
(2)若
,
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e792b0ef3d542237ed0903194597651.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/79dfd7ef-edf1-49ad-a628-116e7181f3ac.png?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fb900d14718e4a47eb9d8a17b0dd8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb9e5e6a64d18753af1bf071f39d906.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-证明题
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名校
【推荐2】如图,在
中,∠B=2∠C,AD⊥BC,垂足为D,判断AB、CD和BD这三条线段的数量关系(用等式表示),并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/bb88c867-9d80-40dd-a47c-8c0d099471f4.jpg?resizew=197)
您最近一年使用:0次