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alas untuk mencari tinggi trapesium
a = (26-20):2
= 6 : 2
= 3
tinggi trapesium
luas = 2(LΔ) + L trapesium
= 2 ( a x t : 2) + ( (a+b) x t : 2)
= 2 ( 5 x 12 : 2) + ( (20 + 26 ) x 4 : 2)
= 2 ( 30 ) + ( 46 x 4 : 2)
= 60 + 92
= 152 cm²
jawabannya A