sebuah limas segitiga, panjang setiap rusuknya sama, yaitu 6 cm. Luas permukaan limas tersebut adalah?
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La = 1/4 6²√3
La = 9√3
Ls = 4 . a. t /2
Ls = 2 . a . t
Ls = 2 . 6 . 3√3
Ls = 36√3
Lp = La + Ls
Lp = 9√3 + 36√3
Lp = 45√3 cm²
semoga gak khilaf ya -__-