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maka tinggi sisi tegak limas = t
t² = (1/2 · s)² + T²
= (1/2 · 8)² + 3²
= 4² + 3²
= 16 + 9
= 25
t = √25
t = 5 cm
maka
Lp = s² + 4 · (1/2)(s)(t)
= s² + 2st
= 8² + 2(8)(5)
= 64 + 80
= 144 cm²
Terimakasih semoga membantu