Q7 of 76 Page 11

Find the measure of each angle of an equilateral triangle.

Let ABC is an equilateral triangle

We know that all the angles in an equilateral triangle are equal.


Therefore,


∠A = ∠B = ∠C (i)


Now,


∠A + ∠B + ∠C = 180o (Sum of all angles of a triangle)


∠A + ∠A + ∠A = 180o


3∠A = 180o


∠A =


= 60o


Hence, the measure of each angle of an equilateral triangle is 60o.


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