Quadrilaterals (Properties) (F)

Quadrilaterals belong to the polygon family, and are so named as they have four sides (this comes from Latin, with QUAD meaning 4, and LATERAL meaning sides). See how well you know the properties of quadrilaterals in this GCSE Maths quiz.

Quadrilaterals, like triangles, appear just about everywhere, and so it is important to have a good understanding of their properties. Starting at a very general level, the sum of the interior angles will add up to 360^o. Can you remember why this is so? Draw in a diagonal, and it will form 2 triangles. The sum of the angles in a triangle is 180^o, so the sum of two triangles will be 360^o.

Once you start adding on other properties, such as a pair of parallel sides, opposite sides are equal length, diagonals bisect each other, then you create special quadrilaterals, that each have their own name.