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bangun 2 : (15-12=3)×(9-3=6) : 2 = 9
luas seluruhnya = 108+9=117
L segitiga = AxT:2
A: 15-12 = 3
T: 9-3 = 6
L segitiga = 3 x 6 : 2 = 9
Jwb: L p.panjang + L segitiga = 108+9 = 117