Calculate the area of an equilateral triangle o... - JAMB Mathematics 2018 Question
Calculate the area of an equilateral triangle of side 8cm
A
8√3
B
16
C
4√3
D
16√3
correct option: d
An equilateral triangle has all sides equal and of the angles equal as 60 degrees each
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\(^2\)
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