siai alas:48cm,tinggi:18cm,luas tra pesium :936

Luas Trapesium
936 = ½ x (a + b) x T
936 = ½ x (48 + b) x 18
936 = (24 + ½b) x 18
936 = 432 + 9b
9b = 936 - 432
9b = 504
b = 504 ÷ 9
b = 56 Cm

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