A square
Any regular polygon with an even number of sides will have opposite angles of equal measure.
No. Parallelograms have only 4 sides with 2 sets of parallel sides: they include squares, rectangles, and rhombuses (rhombi, diamond shapes). Because opposite angles are equal, each pair of parallel sides is equal in length. (For squares and "equilateral rhombi" all four sides are equal in length.)
A Square
this would be a rhombus. rhombuses are parallelograms (four-sided shapes with opposite sides parallel) that have all equal side lengths. squares are included as rhombuses.
Squares have four sides of equal length. In rectangles, the opposite sides are equal to one another. In both shapes, the internal angles are all 90°.
Yes. If a pair of opposite sides are not equal, then you don't have a parallelogram.
equilateral is all equal sides so the opposite would be scalene: no equal sides
-- Opposite sides are parallel.-- Opposite sides are equal.-- Angles are all equal.
Opposite
A rhombus has all sides equal and opposite sides parallel. This includes a square which is a special case of a rhombus with all angles equal (90 degrees) as well. If opposirte sides are equal but not all sides are equal, it is a parallelogram
No, both shapes have all four sides equal.
A regular polygon has all sides equal length, and all of the angles are equal.