it has one obtuse angle and none of the sides are congrent
No. Usually only opposite sides are congruent.
is a regular pentagon if all its angles are congruent and is a general pentagon if they are not.
No.
isosceles
A polygon whose sides are all equal is known as a regular polygon. Some examples include squares and equilateral triangles.
A polygon with all sides and angles the same is called a "regular polygon."
A rhombus, or a square if there's a right angle. ( if there's one, there must be 4!)
A regular polygon is a polygon with congruent sides and interior angles.
A polygon that all sides and angles are the same measurement is a regular polygon.
a square
It all depends on what kind of polygon it is. It may have no congruent sides or all congruent sides.