半径R=1350,弦长L=300求弦所对应的弧长C?
弧所对的圆心角为A.
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((300/2)/1350)
=12.759度
=12.759*PI/180
=0.222682弧度
C=R*A=1350*0.222682=300.62