A square A parallelogram
A polygon with sides of equal length and equal angles is termed a regular polygon.
An isosceles trapezoid has a pair of parallel sides and a pair of equal base angles
All of the angles are equal in a "regular" polygon. (All of the sides are too.)
If all of its interior angles are equal then it is a regular polygon
A square
A polygon with 6 equal sides and angles is called a hexagon.
A parallelogram is a four sided polygon with opposing parallel sides of equal length. Then if it has four right angles, the polygon becomes a rectangle.
A polygon with sides of equal length and equal angles is termed a regular polygon.
a "regular" polygon
An isosceles trapezoid has a pair of parallel sides and a pair of equal base angles
A four-sided polygon with all sides parallel and congruent is a rhombus. If all the angles are equal, it is a special case of a rhombus called a square.
All of the angles are equal in a "regular" polygon. (All of the sides are too.)
If all of its interior angles are equal then it is a regular polygon
A square
It is then called a regular polygon when all angles and sides are of equal values.
There is no special name for that. However, if the sides are also equal, it is called a regular polygon.
That would be called a regular polygon, one with congruent(equal) side legnths and congruent angles.