Classifying Quadrilaterals
A quadrilateral is a shape with four straight sides. There are many types of quadrilaterals, and they are classified based on their diagonals, the number of parallel sides, and congruent angles.
Trapezium
- One pair of opposite sides are parallel
Kite
- Two pairs of adjacent sides are equal
- One pair of opposite angles are equal
- Diagonals intersect at right angles
Parallelogram
- Opposite sides are equal
- Opposite sides are parallel
- Opposite angles are equal
- Diagonals bisect each other
Rhombus
- All sides are equal
- Opposite sides are parallel
- Opposite angles are equal
- Diagonals bisect each other at right angles
- Diagonals bisect the angles of the rhombus
Rectangle
- Opposite sides are equal
- Opposite sides are parallel
- All angles are 90°
- Diagonals are equal
- Diagonals bisect each other
Square
- All sides are equal
- All angles are 90°
- Opposite sides are parallel
- Diagonals are equal
- Diagonals bisect each other at right angles
The classifications of quadrilaterals should be review for you, but feel free to use this page as a reference as well as your text book.