如图,
的周长为20,底边
,
,
的垂直平分线
交
于点D,交
于点E,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d799349b-5135-4a1a-b7bc-36d0d89a44b7.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/d799349b-5135-4a1a-b7bc-36d0d89a44b7.png?resizew=144)
A.13 | B.14 | C.15 | D.16 |
更新时间:2023-01-07 18:25:36
|
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【推荐1】如图,在
中,
、
的垂直平分线分别交
于点
、
,若
,
,
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/2022/12/25/3138280075493376/3162543128109056/STEM/b198ecb352f1444aada02992a940f68c.png?resizew=181)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae8221601c7bd5c51fd520615581fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://img.xkw.com/dksih/QBM/2022/12/25/3138280075493376/3162543128109056/STEM/b198ecb352f1444aada02992a940f68c.png?resizew=181)
A.5 | B.7 | C.10 | D.3 |
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【推荐2】
中,
,
,
,用尺规作图的方法在BC上确定一点P,设
.下列作图方法中,能得到方程
的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3c7a36a0f13a27f97b8b9c9d504cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1682d306c38087d9e6f7efb9cec596a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9334d4bc38bab6fb1bd59e44aacc4964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9b548a0d3cdd8e1eeb8141ff47a0f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】若等腰三角形的两边长分别是3cm和5cm,则这个等腰三角形的周长是( )
A.8cm | B.13cm | C.8cm或13cm | D.11cm或13cm |
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【推荐2】已知等腰三角形的一边长等于1,一边长等于2,则它的周长是( )
A.3 | B.4 | C.4或5 | D.5 |
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