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Verified answer
Sisi miring = 2,5 m (phytagoras 1,5 dan 2)depan dan belakang
= 2 segitiga
= 2 x 1/2 x alas x tinggi
= alas x tinggi
= 3 x 2
= 6 m2
sisi miring kiri dan kanan
= 2 x p x l
= 2 x 4 x 2,5
= 20 m2
bawah
= p x l
= 3 x 4
= 12 m2
total
= 6 + 20 + 12 = 38 m2