如图,在Rt
ABC中,∠C=90°,AB=4.
(1)根据要求用尺规作图:作∠CAB的平分线交BC于点D;(不写作法,只保留作图痕迹)
(2)在(1)的条件下,CD=1,求
ADB的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
(1)根据要求用尺规作图:作∠CAB的平分线交BC于点D;(不写作法,只保留作图痕迹)
(2)在(1)的条件下,CD=1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719555029565440/2725849673474048/STEM/bc30e7d30dba4abba99a19168edffd9b.png?resizew=157)
更新时间:2021-05-21 14:58:16
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相似题推荐
解答题-作图题
|
较易
(0.85)
名校
【推荐1】已知:如图
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/3a02ef56-e9a2-43dd-a093-d5c8be70b868.png?resizew=136)
求作:点P,使得点P在
上,且点P到
的距离等于
.
作法:
以点B为圆心,以任意长为半径作弧,分别交射线
、
于点D、E;
分别以点D、E为圆心,以大于
的长为半径作弧,两弧在
内部交于点F;
作射线
交
于点P.
则点P即为所求.
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)完成下面证明.
证明:连接
、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
在
和
中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be5cde496b13702e1f768b1b6059a45.png)
(
_______________)(填推理的依据)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f7a37d893711f3c415fed87f2eb2ce.png)
,点P在
上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f9468a4f2ecbef2039bceed6ef6954.png)
作
于点Q
点P在
上
(
_______________)(
_______________)(填推理的依据).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/3a02ef56-e9a2-43dd-a093-d5c8be70b868.png?resizew=136)
求作:点P,使得点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
作法:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3be9504b4d7f24528377970a5aa198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
则点P即为所求.
(1)使用直尺和圆规,补全图形(保留作图痕迹);
(2)完成下面证明.
证明:连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be5cde496b13702e1f768b1b6059a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9749de43d4126a6c405963d316088e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f7a37d893711f3c415fed87f2eb2ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5ec6ae60e65b8e9e4535d7ed8824be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f9468a4f2ecbef2039bceed6ef6954.png)
作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/709980626e94ca3c7cdc2cbbfe95061c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3be9504b4d7f24528377970a5aa198.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐1】如图,
中,
,
,在
边上求作一点
,使
(用尺规作图,保留作图痕迹,不写画法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d78524f98b01fa1dadfd277939665b9.png)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
名校
【推荐2】如图,已知
.
(1)尺规作图:作
的平分线
交
于点D(保留作图痕迹,不写作法);
(2)在(1)的条件下,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43be568ae5186900cfb39484a3c9301.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/9/1abf4f11-ae83-416b-9d5d-f02444088290.png?resizew=153)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cfc2771aa0d5b97d2297f8a26a6f6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)在(1)的条件下,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
您最近一年使用:0次