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a = 2 √2
P₁ = 2 √2 x 2 √2 = 8
h² + (2 √2/2)² = (2 √2)²
h² + 2 = 8 /-2
h² = 6 /√
h = √6
P₂ = 2 √2 x √6/2 = 2 √12/2 = √12
P₃ = P₂
Pc = P₁ + P₂ + P₃ = 8 + √12 + √12