przekatna graniastoslupa prawiodlowego czworokatnego ma dlugosc 6 i tworzy z plaszczyzna podstawy kat ktorego tangens jest rowny 2 piersiastki z 2 oblicz objetosc tego graniastoslupa
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tg b = 2pierw{2}
tg b = h/pierw{2}
h=tg b * a*pierw{2} = 2pierw{2}*a*pierw{2} = 4a
h=4a
h^{2} + (a*pierw{2})^{2} = 6^{2}
16a^{2} + 2a^{2} = 36
18a^{2} = 36
a^{2} = 2
a=pierw{2}
h=4a = 4pierw{2}
V = a^{2}*h=2*4pierw{2} = 8pierw{2}