Oblicz objetość i pole powieszchni stożka, gdy H=12,1=13 .PROSZE O ROZWIĄZANIE I DOKŁADNE WYJAŚNIENIE.
H = 12
l = 13
r - promień podstawy
Mamy
H^2 + r^2 = l^2
r^2 = l^2 - H^2 = 13^2 - 12^2 = 169 - 144 = 25
r = p (25 ) = 5
Objetość stożka
V = (1/3) Pp* H = (1/3) pi *r^2 * H
V = (1/3)* pi * 25*12 = 100 pi [ j^3 ]
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Pole powierzchni stożka
Pc = Pp + Pb = pi r^2 + pi*r*l
Pc = pi*25 + pi*5*13 = 25 pi + 65 pi = 90 pi [ j^2 ]
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H = 12
l = 13
r - promień podstawy
Mamy
H^2 + r^2 = l^2
r^2 = l^2 - H^2 = 13^2 - 12^2 = 169 - 144 = 25
r = p (25 ) = 5
Objetość stożka
V = (1/3) Pp* H = (1/3) pi *r^2 * H
V = (1/3)* pi * 25*12 = 100 pi [ j^3 ]
=============================
Pole powierzchni stożka
Pc = Pp + Pb = pi r^2 + pi*r*l
Pc = pi*25 + pi*5*13 = 25 pi + 65 pi = 90 pi [ j^2 ]
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