如图△ABC中,∠A=85°,∠B=38°,则∠ACD为( )
A.67° | B.95° | C.123° | D.142° |
更新时间:2020-12-14 13:31:25
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【知识点】 三角形的外角的定义及性质解读
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【推荐1】如图,△ABC是等边三角形,AD⊥BC于点D,点E在AC上,且AE=AD,则∠DEC的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/763fcd66-3079-4ac0-870c-85bb5614c1ce.png?resizew=173)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/763fcd66-3079-4ac0-870c-85bb5614c1ce.png?resizew=173)
A.105° | B.95° | C.85° | D.75° |
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【推荐2】如图,四边形
内接于
,
是
上一点,且
,连接
并延长交
的延长线于点
,连接
,若
,
,则
的度数为( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d801edd85c816522ae1e40b83ae9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f6f7304aba56f2f05942266833bef5.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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