题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105041351-19563.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105041352-79020.png)
∵扇形彩纸片是30%圆周,因而圆心角是108°
∴剪去的扇形纸片的圆心角为108°-90°=18°.
剪去的扇形纸片的圆心角为18°.
核心考点
试题【现有30%圆周的一个扇形彩纸片,该扇形的半径是40cm,小红同学为了在“六一”儿童节联欢晚会上表演节目,他打算剪去部分扇形纸片后,利用剩下的纸片制作一个底面半径】;主要考察你对圆的认识等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105041348-70668.jpg)
(1)求证:AT平分∠BAC。
(2)若AD=2,TC=
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A.![]() | B.![]() |
C.![]() | D.![]() |
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