Pc = 27 cm²
a = 3 cm
V = ?
Pc = a²+4*1/2*a*Hb
3²+2*3*Hb = 27
6Hb = 27-9
6Hb = 18 |:6
Hb = 3 cm
H²+(1/2a)² = Hb²
H² = 3²-(3/2)²
H² = 9-9/4
H² = 27/4
H = √27/√4
H = 3√3/2
V = 1/3*a²*H
V = 1/3*3²* 3√3/2
V = 9√3/2 cm³
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Pc = 27 cm²
a = 3 cm
V = ?
Pc = a²+4*1/2*a*Hb
3²+2*3*Hb = 27
6Hb = 27-9
6Hb = 18 |:6
Hb = 3 cm
H²+(1/2a)² = Hb²
H² = 3²-(3/2)²
H² = 9-9/4
H² = 27/4
H = √27/√4
H = 3√3/2
V = 1/3*a²*H
V = 1/3*3²* 3√3/2
V = 9√3/2 cm³