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Find the length of the chord |AB| in the diagram shown above.

Mathematics
JAMB 2019

Find the length of the chord |AB| in the diagram shown above.

  • A. 4.2 cm
  • B. 4.3 cm
  • C. 3.2 cm
  • D. 3.4 cm
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Correct Answer: Option D
Explanation

Length of chord = \(2r \sin (\frac{\theta}{2})\)

= \(2(3) \sin (\frac{68}{2})\)

= \(6 \sin 34\)

= \(6 \times 0.559\)

= 3.354 cm \(\approxeq\)  3.4 cm

There is an explanation video available below.


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Explanation Video

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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free