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An arc of circle of radius 2cm subtends an angle of 60º at the centre. Find...

Mathematics
JAMB 1979

An arc of circle of radius 2cm subtends an angle of 60º at the centre. Find the area of the sector

  • A. \(\frac{2 \pi}{3}\)cm2
  • B. \(\frac{\pi}{2}\)cm2
  • C. \(\frac{\pi}{3}\)cm2
  • D. \(\pi\)cm2
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Correct Answer: Option A
Explanation

Area of a sector \(\frac{\theta}{360}\) x \(\pi\)r\(^2\)

= \(\frac{60^o}{360^o}\) x \(\pi\)2\(^2\)

= \(\frac{2 \pi}{3}\)cm2


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