it is a polygon having four sides, four angles, and four vertices.
QUADRILATERAL
A parallelogram that has 4 right angles, 2 opposite sides that are equal and 4 vertices
RECTANGLE
A parallelogram that has 4 equal sides, 4 right angles and 4 vertices.
SQUARE
A parallelogram that has 4 equal sides. Opposites sides are parallel and opposite angles are equal.
RHOMBUS
A quadrilateral with two pairs of parallel sides its opposite sides are equal.
PARALLELOGRAM
A quadrilateral with only one pair of opposite sides that are parallel.
TRAPEZOID
