tolong bantu jawab ya......
V = a x t/2 x T
= 10 x 15/2 x 20
= 5 x 15 x 20
= 1.500 cm³
LP = (2 x a x t/2) + ((a + b + c) x T)
= (2 x 15 x 10/2) + ((10 + 15 + 25) x 20)
= ( 15 x 10) + (50 x 20)
= 150 + 1.000
= 1.150 cm²
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