Question

Two angles of a triangle are equal and third angle is smaller than other by 15 degree. Find the angles.

Answer 1

Let 2 angles that are equal be x and A.T.Q third angle is x - 15

Now,

x + x + ( x - 15 ) = 180 ( Angle sum property of a triangle )

x + x + x - 15 = 180°

3x = 180 - 15

x = 165 / 3

x = 55°

First and second angle = x = 55°

And third angle = x - 15 = 55 - 15 = 40°

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