Luas = (9cm + 21cm ÷ 2) x 10 cm 2
= (30cm ÷ 2) x 10 cm2
= 15 cm x 10 cm = 150 cm2
luaa trapesium
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Luas = (9cm + 21cm ÷ 2) x 10 cm 2
= (30cm ÷ 2) x 10 cm2
= 15 cm x 10 cm = 150 cm2
luaa trapesium