any regular polygon
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A shape with five angles and five sides that do not all measure the same is an irregular pentagon. A regular pentagon has all five sides and angles the same size.
All three sides are congruent (equal in length); all three angles are congruent (same measure).All three sides are congruent (equal in length); all three angles are congruent (same measure).All three sides are congruent (equal in length); all three angles are congruent (same measure).All three sides are congruent (equal in length); all three angles are congruent (same measure).
all sides = the same all angles are the same
That's called a "regular" polygon. By the way: If all sides are the same length, then all angles are automatically the same measure, and if all angles are the same measure, then all sides are automatically the same length. So it's not necessary to state both conditions, because if you have either one, then you automatically get the other one too.
Rectangle or square. If all the sides are the same size then it is a square. if not, it is a rectangle.