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wysokosc ostroslupa H=1/3a
to wysokosc podstawy hp=a√3/2
czyli 2/3hp=2/3·a√3/2=a√3/3
tgα=H/(2/3hp)=(1/3a)/(a√3/3)=1/3 ·3/√3=1/√3=√3/3 to α=30stopni
b)wysokosc ostroslupa H=a
tgα=H/(2/3hp)=a/(a√3/3)=1/(√3/3)=1·3/√3=3/√3=3√3/3=√3 to α=60stopni