Sebuah trapesium memiliki luas 120 cm² jumlah 2 sisi sejajar 40 cm. Berapa tinggi trapesium?
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Jawaban:
L trapesium = ½ × (a+b) × t
120 = ½ × 40 × t
120 = 20t
t = 120/20
t = 6 cm