A shape where all the sides are equal and all the angles are equal. If all sides are equal but angles or not, it is equilateral. If it is vice versa, it is equiangular.
triangular pyramid-4 equal faces
There is no specific name, except in the case of a triangle: scalene. You should not call it simply an irregular polygon, because a regular polygon implies that ALL sides are equal and ALL angles are equal. So a rhombus, where all four sides are equal, is still irregular.
A hexagon has all six sides in equal length and all angles in equal measure.
That depends on what you mean by "diamond shape." In a general shape, no, the sides need not be exact. If the shape is distinctly called a "rhombus," then mathematically speaking, yes, all sides must be equal, per the definition of a rhombus.
Square. By definition, its sides must all be equal.
There is no specific name for such a quadrilateral.
It is an irregular shape or polygon that doesn't have all sides equal
A shape where all the sides are equal and all the angles are equal. If all sides are equal but angles or not, it is equilateral. If it is vice versa, it is equiangular.
A regular pentagon has 5 sides and all sides are equal. Therefore 2 of the sides are also equal.
A square is a four-sided shape with all sides equal and all angles equal.
As long as the angles are all equal as well then it is a regular shape.
A shape with six sides is a hexagon. A hexagon with all sides and angles equal is a regular hexagon.
all the sides of the shape are equal (:
When all its sides and angles are equal.
It is an irregular shape
This shape is called an icosikaitera. All of the sides of the icosikaitera are all of the same equal length.