Given an arc of length 144mm on a circle of radius 120mm. Find the radian number of the angle oppos
.angle opposite yo the arc
求解题过程
人气：318 ℃ 时间：2020-05-08 06:34:08
解答
The perimeter of a circle:2x3.14x120=753.6(mm)
The radian number of the angles opposite to the arc:144/753.6x360=69
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