What polygon has equal sides and equal angles?

Answer 1

A polygon that has congruent sides and congruent angles is called a Regular polygon.

If the number of sides is given, you can be more specific.

Some examples:

3 congruent sides/angles = equilateral triangle

4 congruent sides/angles = square

5 congruent sides/angles = regular pentagon

6 congruent sides/angles = regular hexagon

...and so on, by adding "regular" in front of the shape's name.

Answer 2

That would be a square. a square polygon does.

Answer 3

That's true of any polygon with four sides.