The parallel sides of a trapezium measure 12 cm and 18 cm, and the perpendicular distance between them is 8 cm. Calculate the area of the trapezium.
Answer and explanation
Correct answer: C. 120 cm²
- Step 1: Area of trapezium formula: A = 0.5(a + b)h. Step 2. Substitute values: A = 0.5(12 + 18)(8) = 0.5(30)(8) = 15 × 8 = 120 cm². Answer: 120 cm². Why not the others: 240 cm² forgets the factor of 0.5; 144 cm² uses (18 × 8); 96 cm² uses (12 × 8).
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