Luas trapesium pada gambar di atas adalah C. 480 cm²
a = (30-10)/2 = 20/2 = 10 cm
t² = 26² - 10²
t² = 676 - 100
t² = 576
t = √576
t = 24 cm
L = ½ × jumlah sisi sejajar × t
L = ½ × (10 + 30) × 24
L = ½ × 40 × 24
L = 20 × 24
L = 480 cm²
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Luas trapesium pada gambar di atas adalah C. 480 cm²
Langkah langkah
a = (30-10)/2 = 20/2 = 10 cm
t² = 26² - 10²
t² = 676 - 100
t² = 576
t = √576
t = 24 cm
L = ½ × jumlah sisi sejajar × t
L = ½ × (10 + 30) × 24
L = ½ × 40 × 24
L = 20 × 24
L = 480 cm²