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Pp=6*a²√3/4
Pp=6*3²√3/4
Pp=6*9√3/4
Pp=13,5√3cm²
H²+3²=5²
H²=25-9
H²=16
H=√16
H=4cm
V=1/3 * Pp * H
V=1/3 * 13,5√3 * 4
V=18√3cm³
c = 5 cm
Pp = 6*a²√3/4 = 6*(3cm)² √3/4 = 54√3/4 cm²
h² = c² - a² = 5² - 3² = 25 - 9 = 16
h = √16 = 4
h = 4 cm
V = (1/3)*Pp *h = (1/3)* [54√3/ 4]cm² * 4 cm = 18√3 cm³
Odp. V = 18 √3 cm³
x²+3²=5²
x²=9=25
x²=25-9
x²=16
x=4
V=⅓PpxH
Pp=6x a²√3/4
Pp=6x 3²√3/4
Pp=27√3/2
V=⅓x27√3/2x4
V=54√3/3
V= 18√3