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Luas Bangun 1
1/2×(12+20)×12
1/2×32×12 = 16×12
= 192
Luas Bangun 2
12×12
= 144
Total Luas Keseluruhan = LB1 + LB2
= 192+144 = 336
=> D.336
segitiga 2 buah = 24 x 2 = 48
luas pesegi = s x s = 12 x 12 = 144
persegi 2 buah = 144 x 2 = 228
luas gabungan = luas 2 buah segitiga + luas 2 buah persegi = 48 + 288 = 336
semoga membantu ^^