Pakai caranya yaa Yang jawab duluan jawaban tercerdas

Ltrapesium = ½ × ( a + b) × t
270 cm² = ½ × (15 + b) × 12
270 cm² = 6 × (15 + b)
270 ÷ 6 = 15 + b
45 = 15 + b
b = 45 - 15
b = 30
EP = ½ × (30 - 15) = ½ × 15 = 7,5 cm