Either scalene triangle or a circle
Any regular polygon, by definition has equal sides and angles. Also Rhombus and Star see the link
Scalene has no equal sides or angles
The most precise name for a shape that is both a rectangle and a rhombus is a square. A square is a quadrilateral with four equal sides and four right angles, meeting the criteria of both a rectangle (opposite sides are equal and parallel, and angles are right angles) and a rhombus (all sides are equal). Therefore, a square is the most specific term to describe a shape that is both a rectangle and a rhombus.
Equilateral triangle.Also a square.Also a regular pentagon.Also any regular polygon of any number of sides.A shape with equal sides and angles is a called a regularshape.[But there are also other shapes, such as a rhombus, which has equal sides but is not a regular polygon because it does not have equal angles. There is no collective name for such "squashed" polygons".]
The scalene triangle has no equal sides, and, therefore, no equal angles. (A triangle with no equal sides cannot have any equal angles and vice versa.)
There is no name for such a figure. Quadrilaterals such as a trapezium or kite or even one with no equal sides can have a right angle.
The answer is irregular * * * * * That is not true. A rhombus is irregular but does have equal sides. Any shape with equal sides - other than an equilateral triangle - can be distorted so that its angles are not equal. That is enough to make it irregular, even though the sides remain of the same length. There is no specific name for such shapes.
The name of a regular polygon with five equal sides and five equal angles is a pentagon. Each of the internal angles is equal to 108 degrees.
If those are the only sides and angles it has, then it's a regular pentagon.
All regular polygons have equal sides. In addition there are others, such as a rhombus, which also have equal sides but are not regular because their angles are not all the same. There is no generic name for such "squashed" polygons.
There is no specific name for a polygon in which all the angles are different or where the sides are all different.
square?