WAEC Mathematics 2014 Objective — Question 24
Question 24 of 50 from the West African Examinations Council (WAEC) Mathematics 2014 Objective paper, with the correct answer and a full explanation.
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A chord, 7cm long, is drawn in a circle with radius 3.7cm. Calculate the distance of the chord from the centre of the circle.
- A. 0.7cm
- B. 1.2cmCorrect
- C. 2.0cm
- D. 2.5cm
Explanation
By Pythagoras: 3.7² = 3.5² + h², so h² = 13.69−12.25 = 1.44, h = √1.44 = 1.2cm.
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