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).

Diagonals of a kite are perpendicular to one another

Picture of Quadrilateral

Property of Quadrilateral

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.

An example of a concave quadrilateral is a dart.

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