A quadrilateral
a Quadrilateral
A regular polygon is a polygon in which all sides are of the same length and all angle are of the same measure. A trapezoid (trapezium to most people) is a four sided polygon or a quadrilateral. If its sides and angles were all equal, the quadrilateral would have to be a square.
A tangential quadrilateral is a four sided polygon such that each of its sides is tangent to the same circle.
No not every quadrilateral can be a regular polygon.
A four-sided quadrilateral is always classified as a polygon.
A quadrilateral
I believe you are looking for the word quadrilateral. http://en.wikipedia.org/wiki/Polygon#Naming_polygons http://en.wikipedia.org/wiki/Quadrilateral
No.No.No.No.
Yes a quadrilateral is a polygon with 4 sides.
To be a quadrilateral polygon. To be a quadrilateral polygon.
which type of quadrilateral is never a regular polygon