如图,在平行四边形ABCD中,用直尺和圆规作∠BAD的平分线AG,若AD=5,AB=8,,则CG的长是( )
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262324446003200/2262428725698560/STEM/f2c48874d6f147c4a8345a4362201858.png?resizew=135)
![](https://img.xkw.com/dksih/QBM/2019/8/5/2262324446003200/2262428725698560/STEM/f2c48874d6f147c4a8345a4362201858.png?resizew=135)
A.2 | B.3 | C.4 | D.5 |
更新时间:2019-08-13 21:37:29
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【知识点】 利用平行四边形的性质求解解读
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【推荐2】△ABC中,点D,G分别在边AB,AC上,点E,F在边BC上.已知DG∥BC,DE∥FG,BE=DE,CF=FG,则∠A的度数( )
![](https://img.xkw.com/dksih/QBM/2021/11/8/2846928986275840/2848375301283840/STEM/8c93df43-2147-4003-9393-120b6ea39bdb.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2021/11/8/2846928986275840/2848375301283840/STEM/8c93df43-2147-4003-9393-120b6ea39bdb.png?resizew=156)
A.等于90° | B.等于80° |
C.等于72° | D.条件不足,无法计算 |
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