Properties of a quadrilateral
![](http://etc.usf.edu/clipart/38600/38615/parallelogr_38615_md.gif)
Parallelogram
- Opposite angles are congruent.
- Opposite sides are of equal length.
- Opposite sides are parallel.
- The diagonals bisect each other.
Kite
- Adjecent sides are equal.
- Opposite angles are congruent.
- The diagonals cross/bisect each other at 90 degrees.
![](http://upload.wikimedia.org/wikipedia/commons/f/fa/Trapezium_example.png)
Trapezium
- One pair of opposite sides are parallel.
![](http://upload.wikimedia.org/wikipedia/commons/9/99/Distorted_truncated_square_tiling.png)
SQUARE
- A square is a regular quadrilateral.
- All angles are equal to 90 degrees.
- All sides are of equal length.
- Opposite sides are parallel.
- The diagonals bisect each other at 90 degrees.
- The diagonals are of equal length.
Rectangle
- A rectangle is a quadrilateral.
- All angles are equal to 90 degrees.
- The opposite sides are equal and parallel.
- The diagonals are of equal length.
![](http://images.fineartamerica.com/images-medium-large/blue-rhombus-with-coloured-bands-marcus-west.jpg)