The lengths of the parallel sides of a trapezium are 9cm and 12cm. If the...
MATHEMATICS
WAEC 2022
The lengths of the parallel sides of a trapezium are 9cm and 12cm. If the area of the trapezium is 105cm2, find the perpendicular distance between the parallel sides.
- A. 5cm
- B. 7cm
- C. 10cm
- D. 15cm
Correct Answer: C. 10cm
Explanation
Area of a trapezium = \(\frac{[a+b]h}{2}\)
105 = \(\frac{[9+12]h}{2}\) → 105 x 2 =21h
h = \(\frac{210}{21}\) → 10cm
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