Odpowiedzi

2009-10-11T21:40:51+02:00
Pkoła = πR²
h=3/2R
a√3/2 = 3/2R
a = 3/2R*2/√3 = R√3
P_delta = (R√3 )²√3/4 = 3R²√3/4
P_delta/P_koła*100% = 3R²√3/4/πR²*100% = 3√3/4π*100% = 41%


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