复习《圆》时,展示出如下内容:“如图,△ABC内接于圆O,直径AB的长为6,过点C的切线交AB的延长线于点D.”两位同学给出如下说法:
小明说:若添加条件∠D=30°,则能求出AD的长,且AD=9;
小亮说:若添加的条件时∠A=30°,可以得到AC=DC.
对于两人的说法你认为( )
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949276113977344/2949667182624768/STEM/16333e74-7715-4d55-b1c3-41dde75373c5.png?resizew=158)
小明说:若添加条件∠D=30°,则能求出AD的长,且AD=9;
小亮说:若添加的条件时∠A=30°,可以得到AC=DC.
对于两人的说法你认为( )
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949276113977344/2949667182624768/STEM/16333e74-7715-4d55-b1c3-41dde75373c5.png?resizew=158)
A.小明对,小亮不对 | B.小明不对,小亮对 |
C.小明、小亮都对 | D.小明、小亮都不对 |
更新时间:2022-04-02 20:16:09
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