Krishna
0

Step 1: Recall the Equilateral triangle properties

            NOTE: An equilateral triangle has all equal sides and all equal angles.


Step 2: Assume any variable In the place of the angle

            EXAMPLE: Angle = x

Step 3; Add all angles in the equilateral triangle

            NOTE: All angles are equal in equilateral triangle

            EXAMPLE: = x + x + x

                              = 3x

Step  4: Set up an equation equating 180 \degree

                3x = 180

                 x = \frac{180}{3}

                x = 60