The area of the equilateral triangle is 20√3 cm². Find the length of the side.
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Area of equilateral triangle = root3 a^2 / 4
=> 20 root3 = root3 a^2 / 4
=> 80 root3 / root3 = a^2
=> a^2 = 80
=> a = 5 × 16
=> a = 4 root5
Side of triangle = 4 root5 cm
=> 20 root3 = root3 a^2 / 4
=> 80 root3 / root3 = a^2
=> a^2 = 80
=> a = 5 × 16
=> a = 4 root5
Side of triangle = 4 root5 cm
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this will help you mate . ..............
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