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Calculate the area of an equilateral triangle of side 8cm

Mathematics
JAMB 2018

Calculate the area of an equilateral triangle of side 8cm

  • A. 8√3
  • B. 16
  • C. 4√3
  • D. 16√3
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Correct Answer: Option D
Explanation

An equilateral triangle has all sides equal and all angles equal as 600

  Area = \(\frac{1}{2}\) absinθ

  Area = \(\frac{1}{2}\) x 8 x 8 x sin60

  = \(\frac{1}{2}\) x 64 x \(\sqrt{\frac{3}{2}}\)

  = 16√3 cm\(^2\)

There is an explanation video available below.


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Explanation Video

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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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