已知弧长1270拱高155求弦长
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已知弧长1270拱高155求弦长
已知弧长C=1270拱高H=155求弦长L
弧半径为R,弧所对的圆心角为A.
Rn+1=(1-(Rn*COS(C/(2*Rn))-Rn+H)/((C/2)*SIN(C/(2*Rn))-H))*Rn
R0=1300
R1=1272.97
R2=1274.02
R3=1274.02
弧半径R=1274.02
A=C/R
=1270/1274.02
=0.996845弧度
=0.996845*180/PI
=57.115度
L=2*R*SIN(A/2)
=2*1274.02*SIN(57.115/2)
=1218.07
弧半径为R,弧所对的圆心角为A.
Rn+1=(1-(Rn*COS(C/(2*Rn))-Rn+H)/((C/2)*SIN(C/(2*Rn))-H))*Rn
R0=1300
R1=1272.97
R2=1274.02
R3=1274.02
弧半径R=1274.02
A=C/R
=1270/1274.02
=0.996845弧度
=0.996845*180/PI
=57.115度
L=2*R*SIN(A/2)
=2*1274.02*SIN(57.115/2)
=1218.07