Equilateral triangle and their angles

Equilateral Triangle - Definition: A triangle with all equal sides
Steps 1) Click on the slider, d. 2) Move it left and right. 3) Observe the sides of the triangle. 4) Then, observe the angles of the triangle. Questions 1) Is this an equilateral triangle? Explain. 2) What do you realize about sides of the triangle? 3) What do you realize about angles of the triangle?