如图,在梯形ABCD中,AD∥BC,若AB=AD=DC=3,∠A=120°,则梯形ABCD的周长为_____ .
![](https://img.xkw.com/dksih/QBM/2019/12/24/2361885540466688/2362062580596736/STEM/ffdb38265b2a4a81b4969a8229ab1afd.png?resizew=192)
更新时间:2019-12-24 15:31:32
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适中
(0.65)
【推荐1】如图,在
中,
,
,
,延长
到点D,使
,分别过点B,D作
,
,连接
,点M,N分别是
的中点,连接
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
______ .
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适中
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【推荐2】如图,梯形
中,AB
CD,
,
,
于
,且
,那么梯形
的周长为___ ,面积为___ .
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