A trapezium has parallel sides of lengths 8 cm and 12 cm, and a perpendicular height of 6 cm. Find its area.
Answer and explanation
Correct answer: B. 60 cm²
- Step 1: The area of a trapezium is A = 1/2 (a + b) h. Step 2. Substitute: A = 1/2 (8 + 12) 6 = 1/2 20 6 = 10 6 = 60 cm². Answer: 60 cm². Why not the others: 48 cm² uses 86; 72 cm² uses 12*6; 120 cm² omits the 1/2 factor.
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