Each angle of an equilateral triangle is 60 degree.
Geogebra Applet related with each angle of an equilateral triangle is equal to 60 degree.
Instructions :
1) Move the slider 
to make the sides and equilateral triangle dynamic.
2) Observe the sides if AB = BC = AC .
3) Observe the angles of triangle ABC. Is ∠ A = ∠ B = ∠ C =60°
4) Draw the conclusion from the activity that ∠ A = ∠ B = ∠ C = 60°.
to make the sides and equilateral triangle dynamic.
2) Observe the sides if AB = BC = AC .
3) Observe the angles of triangle ABC. Is ∠ A = ∠ B = ∠ C =60°
4) Draw the conclusion from the activity that ∠ A = ∠ B = ∠ C = 60°.By Mahanth Chaudhary
Mathematics Teacher and Trainer.