a polygon with 4 right angles and 4 sides of the same length
any regular polygon
A polygon with 2n sides (n>1) can have opposite angles congruent.
Not all polygons are regular by definition. An irregular polygon may have non-congruent sides or non congruent angles or both. A regular polygon will always have both congruent sides and angles.
Any polygon with 2n sides (n integer) where opposite sides are parallel, will have its opposite angles congruent.
Not necessarily. A convex heptagon is a polygon but it need not have all sides and angles congruent.
yes
congruent; congruent
true
Yes
with all sides equal (congruent) AND all angles equal (congruent). In these circumstnces the adjective "convex" is redundant.
Convex polygons with congruent sides and congruent angles are called regular polygons.
It would be an irregular polygon that has not congruent sides and angles
That is called a regular polygon.
That doesn't have a special name. If all the angles are also congruent (and convex), then it is called a regular polygon.
Regular polygons have congruent sides and angles
A regular polygon is a polygon with congruent sides and interior angles.