oblicz pole powierzchni całkowitej i objętość stożka o promieniu długości 3cm i wysokości równej 4cm
Pc = Pp + Pb
V = 1/3Pp * H
Pp = πr²
Pp = 9π
Pb = πrl
4² + 3² = c²
c = √25 = 5 c w naszym przypadku to l czyli tworzaca
Pb = π3 * 5
Pb = 15π
Pc = 9π + 15π = 24π cm²
V = 3π * 4cm
V = 12π cm³
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Pc = Pp + Pb
V = 1/3Pp * H
Pp = πr²
Pp = 9π
Pb = πrl
4² + 3² = c²
c = √25 = 5 c w naszym przypadku to l czyli tworzaca
Pb = π3 * 5
Pb = 15π
Pc = 9π + 15π = 24π cm²
V = 1/3Pp * H
V = 3π * 4cm
V = 12π cm³