5 pairs of parallel sides.
None.
None. (As there are an odd number of sides, each side is opposite a vertex and there are no parallel sides.)
A square is a four-sided polygon with two congruent parallel sides.
Yes providing that it is a regular 8 sided polygon.
A square is a regular polygon with two sets of parallel sides. A parallelogram is an irregular polygon with one set of parallel sides. A rhombus is an irregular polygon with two sets of parallel sides. A rectangle is an irregular polygon with two sets of parallel sides. *Note - a regular polygon is a shape in which all sides are equal in length and all angles are equal in measurement.
A four-sided polygon with opposite sides parallel and all sides congruent is a square.
A regular polygon has equal length sides while a polygon does not have to have equal sides.
any regular polygon with an odd number of sides... triangle, pentagon, septegon, etc. a quadrillateral is a 4 sided that may or may not have parallel sides.
Any odd sided regular polygon, ie an equilateral triangle, a regular pentagon, a regular heptagon, ...
It is a regular 12 sided dodecagon polygon
No. A parallelogram, for example, is not a regular polygon. Even a rhombus, with parallel sides of equal lengths is not.