1. Types of quadrilaterals
Thursday, 04 April 2019

2. 1. Square
Properties
All sides are of the same length
All angles are the same, 90
Has two sets of parallel sides
Has four lines of symmetry
Has rotational symmetry of order 4

3. 2. Rectangle
Properties
Has two sets of sides of the same length
All angles are the same, 90
Has two sets of parallel sides
Has two lines of symmetry
Has rotational symmetry of order 2

4. 3. Parallelogram
Properties
Has two sets of sides of the same length
Opposite angles are equal
Has two sets of parallel sides

5. 4. Rhombus
Properties
All sides are of the same length
Opposite angles are of the same size
Has two sets of parallel sides
Has two lines of symmetry
Has rotational symmetry of order 2

6. 5. Trapezium
Properties
Has one set of parallel sides
Isosceles trapezium
Has two sets of angles of equal size
Has one line of symmetry

7. 6. Kite
Properties
Has one set of equal angles
Has one line of symmetry

8. 7. Quadrilateral
Any four sided polygon which does not fit into any of the described shapes is simply known as a quadrilateral.

9. Example
Name each of the following quadrilaterals
(a) (b) (c)
(d) (e) (f)