= (di r2 / 360) x Winkel
=
= di r2 x (/360)
= 2b x r = 2 x 37,5 ms2 x 24 m = 1800 sm2
= 2 x 234,375 ms2 x 150 = 7,03125e+4 sm2
= 3,125 x 9,216e+7 x 0,25 = 7,2e+7 sm2