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10+4+7+2+3+3+8= 42
Luas 1 = 8x5
=40
Luas 2 = 5x4
=20
Luas 3 = 3x2
=6
Luas total: 66cm2
= 42 cm
Luas :
Bangun 1 : 8 x (3+2) = 8 x 5 = 40 cm²
Bangun 2 : 4 x (10-3-2) = 4 x 5 = 20cm²
Bangun 3 : 3 x 2 = 6 cm²
Luas = 40 + 20 + 6 = 66 cm²
Maaf klo salah :)