如图,在△ABC中,∠A=90°,BC边上的高为AD.
(1)用尺规作图画出AD(保留作图痕迹,不写作法,画完后用黑色签字笔描黑);
(2)求证:AD2=BD•CD.
(1)用尺规作图画出AD(保留作图痕迹,不写作法,画完后用黑色签字笔描黑);
(2)求证:AD2=BD•CD.
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090227406831616/2093069510533120/STEM/750d0e556f34407b83d2761bba123a63.png?resizew=152)
更新时间:2018-11-24 21:23:06
|
相似题推荐
解答题-作图题
|
较易
(0.85)
【推荐1】如图,
与
是两条公路,点
处是两个村庄,现在要建个菜场,使它到两个村庄的距离相等,且到两条公路的距离也相等,用尺规作图画出菜场的位置,保留作图痕迹.(不写作法)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://img.xkw.com/dksih/QBM/2020/3/12/2417901426483200/2418172414656512/STEM/69628872f8d64703aa60bd938cac6c1a.png?resizew=147)
您最近一年使用:0次
解答题-作图题
|
较易
(0.85)
【推荐2】如图,已知Rt△ABC中∠C=90°,AB=10,AC=8.
(1)作AB的垂直平分线DE,交AB于点D,交AC于点E.(要求尺规作图,不写作法,保留作图痕迹);
(2)求AE的长.
(1)作AB的垂直平分线DE,交AB于点D,交AC于点E.(要求尺规作图,不写作法,保留作图痕迹);
(2)求AE的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/10/dd6b6557-4826-4346-911f-df43008f1b2c.png?resizew=91)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐1】如图,AC是⊙
直径,D是弧AB的中点,连接CD交AB于点E,点F在AB延长线上,且
.
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977721479593984/2981380464893952/STEM/572072bf-261b-4ad2-afd5-bec4d1d84969.png?resizew=187)
(1)求证:CF是⊙
的切线;
(2)若
,
,求⊙
的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03a09981c03e8e6c00b7a65c56d95050.png)
![](https://img.xkw.com/dksih/QBM/2022/5/12/2977721479593984/2981380464893952/STEM/572072bf-261b-4ad2-afd5-bec4d1d84969.png?resizew=187)
(1)求证:CF是⊙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61e5b8523e99c8b73621cb1664cfb592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4a1ba182bf23f9e6fcfa5cbe3dcd5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
名校
【推荐2】已知:如图,△ABC中,AB =4,BC =8,D为BC边上一点,BD =2.求证:∠BDA =∠BAC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/5011675d-cba2-43ba-b103-ccf091c53735.png?resizew=239)
您最近一年使用:0次