Given an arc of length 144mm on a circle of radius 120mm. Find the radian number of the angle oppos

题目

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

答案

The perimeter of a circle:2x3.14x120=753.6(mm)
The radian number of the angles opposite to the arc:144/753.6x360=69