弧长400,弦长270,求弓高!

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弧长400,弦长270,求弓高!弧长400,弦长270,求弓高!弧长400,弦长270,求弓高!弧长C=400,弦长L=270,求弓高H?弧半径为R.Rn+1=(1+(L-2*Rn*SIN(C/(2*

弧长400,弦长270,求弓高!
弧长400,弦长270,求弓高!

弧长400,弦长270,求弓高!
弧长C=400,弦长L=270,求弓高H?
弧半径为R.
Rn+1=(1+(L-2*Rn*SIN(C/(2*Rn)))/(L-C*COS(C/(2*Rn))))*Rn
R0=143
R1=134.6453
R2=135.6106
R3=135.6266
R4=135.6266
R=135.6266
H=R-(R^2-(L/2)^2)^0.5
=135.6226-(135.6226^2-(270/2)^2)^0.5
=122.642