Geometry Course/Polygon/Quadrilateral

Quadrilateral
A Quadrilateral is a polygon that has four sides and four angles with the total angles equal to 360&deg;
 * Quadrilaterals.svg

Special Quadrilaterals

 * 1) /Parallelogram/
 * 2) /Rhombus/
 * 3) /Rectangle/
 * 4) /Square/
 * 5) /Trapezoid/