Question60. Multiple Choice If the perimeter of a sector is 4 times its radius, then the radian measure of the central angle of the sector is (A) 2 . (B) 4 . (C) . (D) . (E) impossible to determine without knowing the radius.
Studdy Solution
求解方程以找到中心角的弧度：
将 移到等式的一边：
两边除以 ：
中心角的弧度是：
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