wszystkie krawędzie graniastosłupa prawidłowego trójkątnego maja dl 14cm oblicz Pole powierzchni całkowitej
a = h = 14 cm
Pp = a^2 p(3)/4 = ( 14 cm)^2 * p(3)/4 = (196/4) p(3) cm^2 = 49 p(3) cm^2
Pb = 3 * a*h = 3* 14 cm* 14 cm = 3* 196 cm^2 = 588 cm^2
zatem
Pc = 2 Pp + Pb = 2* 49 p(3) cm^2 + 588 cm^2 = [ 98 p(3) + 588 ] cm^2
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Pg=14*14*14=2744cm3
odp.pole graniasłupa wynosi 2744cm3
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a = h = 14 cm
Pp = a^2 p(3)/4 = ( 14 cm)^2 * p(3)/4 = (196/4) p(3) cm^2 = 49 p(3) cm^2
Pb = 3 * a*h = 3* 14 cm* 14 cm = 3* 196 cm^2 = 588 cm^2
zatem
Pc = 2 Pp + Pb = 2* 49 p(3) cm^2 + 588 cm^2 = [ 98 p(3) + 588 ] cm^2
======================================================================
Pg=14*14*14=2744cm3
odp.pole graniasłupa wynosi 2744cm3