Luas trapesium=(a+b)×t/2
=(30+20)×10/2
=50×10/2
=500/2
=250 cm^2
Luas daerah yang tidak diarsir=250-150 =100 cm^2
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Luas trapesium=(a+b)×t/2
=(30+20)×10/2
=50×10/2
=500/2
=250 cm^2
Luas daerah yang tidak diarsir=250-150 =100 cm^2