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S√2 = 50
S√2 =√50√50
S =50 / √2
S = 50√2 /2
S = 25√2
LP = 6S²
= 6 x 25² x√2²
= 7.500 cm²
50 cm = √2s²
√2500 = √2s²
s² = √2500 / √2 = √1250 = 25 √2 cm
luas permukaan = 6s² = 6 x (25 √2)² = 6 x 1250 = 7500 cm²