Properties of quadrilaterals
The angles in a quadrilateral add up to 360°.
The properties of different kinds of quadrilateral are listed below.
Square
A square is the only regular quadrilateral.
All angles are equal (90°).
All sides are of equal length.
Opposite sides are parallel.
The diagonals bisect each other at 90°.
The diagonals are equal in length.
Rectangle
With a rectangle, all angles are equal (90°).
Opposite sides are of equal length.
The diagonals are equal in length.
Opposite sides are parallel.
The diagonals bisect each other.
Rhombus
With a rhombus, all sides are of equal length.
Opposite sides are parallel.
Diagonally opposite angles are equal.
The diagonals bisect each other at 90°.
Parallelogram
A parallelogram has two pairs of equal angles opposite each other.
Opposite sides are of equal length.
Opposite sides are parallel.
The diagonals bisect each other.
Kite
A kite has two pairs of sides of equal length.
One pair of diagonally opposite angles is equal.
Only one diagonal is bisected by the other.
The diagonals cross at 90°
Trapezium
A trapezium has one pair of parallel opposite sides.
