7ckngmad
Marseille, Provence-Alpes-Cote d'Azur, France
 
 
S1 = (3 * √3 * a^2) / 2 = (3 * √3 * 5^2) / 2 = 37.5√3 см^2
S = S1 + S2 = 37.5√3 + 285 ≈ 489.5 + 37.5√3 см^2
V = (1/3) h (A + √(A B) + B)
V = (1/3) 12 (72 + √(17424) + 242).
V = 4 (72 + 132 + 242).
V = 4 446.
V = 1784

L = 2πr * (α/360)
L - длина дуги, r - радиус окружности, α - мера угла в градусах. В данном случае, L = 24 см и α = 120°
24 = 2πr * (120/360)
72 = 2πr.
r = 72 / (2π)
r ≈ 11.46 см
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