Quadrilateral Shapes-Four sided polygons

Related websites for Quadrilaterals

Quadrilateral Shape Game This game from Sheppard Software reviews the properties of quadrilaterals.

Polygons by Math Cats You're about to enter the Polygon Playground!

Polygon Shape Names Learn an easy method for memorizing the names of polygons.

This Venn diagram helps to visualize the relationships among the different Quadrilaterals.

Quadrilaterals can be separated into the following sub-groups.

Squares have all the properties of a quadrilateral, a rhombus, a parallelogram, and a rectangle.

A trapezoid is a quadrilateral based on its four sides, but has only one pair of parallel sides which eliminates it from being a parallelogram.

A kite is a quadrilateral, but not a parallelogram because the opposite sides are not parallel or congruent.

Rhombus

Trapezoid

• Four Sided

• Closed figure

• Four vertices ( also known as corners)

• Interior angles add up to 360◦

• Straight sides, no curves

Kite

Sides of a kite shape, that are next to each other (adjacent sides) are the same length on a kite.

Angles that are opposite each other and between the two different length sides are congruent (equal).

What is a quadrilateral?

The key to a quadrilateral is found in it's name, "Quad" meaning four and "lateral" meaning side.

A quadrilateral is a four sided polygon. In addition a quadrilateral can be convex or concave.

A concave quadrilateral has one reflex angle, or an angle greater than 180 degrees. The reflex angle creates a cavity or a cave, which becomes an easy method to remember a concave quadrilateral.

A “complex quadrilateral” or “self-intersecting” quadrilateral have non-adjacent sides that cross over.

Quadrilateral Shapes- A four sided polygon