A trapezium has height 10 cm and area 180 cm². If one parallel side is 12 cm, what is the other side?
Show answer & explanation
Correct answer: B
Explanation
Height = 10 cm, Area = 180 cm², One side = 12 cm
Area = (1/2) × (a + b) × h
180 = (1/2) × (12 + b) × 10
180 = 5(12 + b)
180 = 60 + 5b
5b = 120
b = 24 cm