Quiz math
Luas daerah yang diarsir adalah
Luas daerah yang diarsir adalah
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bagi jadi dua bagian, kiri dan kanan
bagian kiri
Larsir = L∆ADB - L∆ADC
= ½•9•8 - ½•9•2
= 36 - 9
= 27
bagian kanan
Larsir = L∆ADE - L∆ADC
= ½•9•12 - ½•9•2
= 54 - 9
= 45
Larsir total = Larsir kiri + Larsir kanan
= 27 + 45
= 72 cm²