弦长L=850,半径R=5914.95米,求弧长C?
弧所对的圆心角为A
A=2*ARC SIN((L/2)/R)
=2*ARC SIN((850/2)/5914.95)
=8.241度
=8.241*PI/180
=0.14383弧度
C=A*R
=0.14383*5914.95
=850.73米
弧长C=850.73米