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luas B1=a+b x t : 2=25 +22×17:2=399,5cm2
tinggi trapesium= 39-22=17cm
luas B2=25×22=550cm2
luas B1+B2= 399,5+550=949,5cm2
bangun 2 adalah bangun datar persegi panjang
luas 1 = A × T
= 25 × (39 - 22)
= 25 × 17
=425
luas 2 = P × L
=25 × 22
= 550
luas gab.= 425 + 550
=975