如图,在直角三角形ABC中,
(1)过点A作AB的垂线与∠B的平分线相交于点D
(要求:尺规作图,保留作图痕迹,不写作法);
(2)若∠A=30°,AB=2,则△ABD的面积为 .
(1)过点A作AB的垂线与∠B的平分线相交于点D
(要求:尺规作图,保留作图痕迹,不写作法);
(2)若∠A=30°,AB=2,则△ABD的面积为 .
![](https://img.xkw.com/dksih/QBM/2018/10/1/2043866853220352/2044490515472384/STEM/5b881dce58e84cf9955204c31a081141.png?resizew=128)
更新时间:2018-10-01 23:09:30
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解答题-问答题
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适中
(0.65)
【推荐1】如图,
是
内一点,按要求完成下列问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/cc673d46-8500-47b6-bb29-723bdcd76f2b.png?resizew=169)
(1)过点
作
的垂线,垂足为点
;
(2)过点
作
的平行线,交
于点
;
(3)测量点
到
的距离是 ___________.
(4)比较线段
和
的大小说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/18/cc673d46-8500-47b6-bb29-723bdcd76f2b.png?resizew=169)
(1)过点
![](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/8455657dde27aabe6adb7b188e031c11.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)测量点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
(4)比较线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,矩形
的对角线
,
相交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/2791b635-e640-4a91-afc4-29a0ce2e95b8.png?resizew=199)
(1)尺规作图:作
的角平分线
交
边于点E连接
;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/2791b635-e640-4a91-afc4-29a0ce2e95b8.png?resizew=199)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caaf141e5dc22ed5f29069e21f9adf3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
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解答题-作图题
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适中
(0.65)
【推荐1】用圆规、直尺作图,不写作法,但要保留作图痕迹,并写出结论.如图,现要在
内建一中心医院,使医院到
两个居民小区的距离相等,并且到公路
和
的距离也相等,请确定这个中心医院的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-作图题
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适中
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【推荐2】如图1,在边长为1的小正方形组成的网格中,点A、B、C、D都是格点.
![](https://img.xkw.com/dksih/QBM/2023/6/28/3269280164192256/3273489365434368/STEM/27c814ce83ba4138be9597e9e2c59e5e.png?resizew=550)
(1)点D到
的距离为__________________;
(2)利用网格和无刻度的直尺作图,保留痕迹,不写作法.(友情提醒:辅助线用虚线,求作的线用实线,并加粗加黑)
①在图2中,作矩形
,使得点E、F分别在
、
上;
②在图3中,在
上找一点P,使得
;
③在图4中,在
上找一点M,使得
平分
.
![](https://img.xkw.com/dksih/QBM/2023/6/28/3269280164192256/3273489365434368/STEM/27c814ce83ba4138be9597e9e2c59e5e.png?resizew=550)
(1)点D到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)利用网格和无刻度的直尺作图,保留痕迹,不写作法.(友情提醒:辅助线用虚线,求作的线用实线,并加粗加黑)
①在图2中,作矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②在图3中,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0498b9374bee2169d323c3bd8d2d23d.png)
③在图4中,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df996a28507b87ec4714bdc526c2d64b.png)
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名校
【推荐1】如图,矩形
中,
与
相交于点
.若
,
,求矩形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72d83915b41102495fcff91dbdbb0b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b100dc90c37518567bf90f9d17de4766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/29/55f4f95d-9cb5-46db-9327-f9869dd9fb79.jpg?resizew=120)
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