如图,在Rt△ABC中,∠A=30°,DE是斜边AC的中垂线,分别交AB,AC于D、E两点,若BD=2,则AC的长是( )
![](https://img.xkw.com/dksih/QBM/2019/6/19/2228836549361664/2229448726577152/STEM/c551444ce7d94dcdaa10804c80f84e78.png?resizew=132)
![](https://img.xkw.com/dksih/QBM/2019/6/19/2228836549361664/2229448726577152/STEM/c551444ce7d94dcdaa10804c80f84e78.png?resizew=132)
A.2![]() | B.3![]() | C.4![]() | D.8![]() |
17-18八年级·河北保定·期末 查看更多[3]
【市级联考】河北省保定市安国市2017-2018学年八年级(下)期末数学试题(已下线)19.3 直角三角形的全等-2020-2021学年八年级数学上册《课时同步练》(沪教版)陕西省宝鸡市扶风县2018-2019学年八年级下学期期末数学试题
更新时间:2019-06-19 22:47:57
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,等腰三角形
的底边
长为8,面积为24,腰
的垂直平分线
交边
于点E,若D为
边的中点,P为线段
上一动点,则三角形
的周长的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/42783cec-a2b8-49c5-a977-02c63a3b2a1f.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5082fa0f36a008dc2838146ea2bf2e1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/42783cec-a2b8-49c5-a977-02c63a3b2a1f.png?resizew=160)
A.7 | B.8 | C.9 | D.10 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,等腰三角形
中,
,
,线段
的垂直平分线交
于点
,交
于点
,连接
,则
等于
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81a9afe4b588fccd34b74b0f765a7c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d29e7c4d6216690152430b09f9cf0c2.png)
![](https://img.xkw.com/dksih/QBM/2024/1/22/3416711612014592/3452601772965888/STEM/153768858625406d8c63571f75804f79.png?resizew=4)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/49ad8d9b-e026-4246-b7e1-36ac58aa09e9.png?resizew=104)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】学校在小明家南偏东
方向上,距小明家
,以小明家所在位置为坐标原点建立直角坐标系,
为一个单位长度,则学校所在位置的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57601db9d81fffe2b6b472db94c3c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1890f0b4e81634bb7e013412698640f3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,
是等边三角形,边长为2,根据作图的痕迹,则
的长为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,正方形
中,
垂直于
,且
,
,则阴影部分的面积是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/2019/5/26/2211863784742912/2213459714097152/STEM/471febeb2fc94ed9965ff0777f347cad.png?resizew=113)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7cbfaec1d9dcaaf159b060163436113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/2019/5/26/2211863784742912/2213459714097152/STEM/471febeb2fc94ed9965ff0777f347cad.png?resizew=113)
A.16 | B.18 | C.19 | D.21 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,已知直线l的表达式为
,过点
,
轴,与直线l交于点
,以原点O为圆心,
为半径画弧,交x轴于
,再作
轴,交直线l于
,以原点O为圆心,
为半径画弧,交x轴于
,按此作法进行下去,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/b1b1d397-5edd-4765-8526-5a988314f33a.png?resizew=183)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e028209248ff2520d5d96f3e02f0f21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35dec575333f0256e38271b8e9589791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fc6cf34323f80b94fe2a9d0867d62e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec6fef1782362aa72504af97e30e980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2314397acf3bf2bc1933b239e1ca7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce769f86332639654d0101f427e261d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/29/b1b1d397-5edd-4765-8526-5a988314f33a.png?resizew=183)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次