Luas 1=(8 ×15):2=120:2=60cm2. Luas 2=(6×12):2=72:2=36cm2. Luas 3=(3×6):2=18:2=9cm2. Luas yang di arsir =60+36+9=105 cm2
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Luas 1=(8 ×15):2=120:2=60cm2. Luas 2=(6×12):2=72:2=36cm2. Luas 3=(3×6):2=18:2=9cm2. Luas yang di arsir =60+36+9=105 cm2