A quadrilateral and a tetragon are two possible (correctly spelled) answers.
quadrilateral
Quadrilateral
-- quadrilateral -- parallelogram
Quadrilateral
Quadrilateral and parallelogram
A quadrilateral and a tetragon are two possible (correctly spelled) answers.
polygon & quadrilateral * * * * * That is not really true. A trapezoid is a particular type of quadrilateral and that, in turn, is a particular type of polygon. That does not make them alternative names for a trapezoid.
Quadrilateral.
quadrilateral
Quadrilateral
-- quadrilateral -- parallelogram
Quadrilateral and parallelogram
Quadrilateral
quadrilateral, equilateral
Square and a rhombus * * * * * A rhombus is not a regular quadrilateral (unless it is a square) because being regular requires all sides AND all angles to be equal. So there is only one type of a regular quadrilateral - a square. It may have other names, certainly so in other languages.
quadrilateral and parallelogram