Mathematics for IGCSE & O level - Mensuration (Section 11 - No. 47)
A trapezium has parallel sides of 5cm and 7cm and a height of 3cm. What is the area?
36 cm²
18 cm²
21 cm²
30 cm²
Giải thích
Area = 1/2 * (a + b) * h = 1/2 * (5cm + 7cm) * 3cm = 18 cm²