In this worksheet, we will find the areas of triangles, parallelograms and trapezia.

You should already know the formulae for finding the areas of triangles and parallelograms.

Area of parallelogram = base x height

Area of triangle = ½ base x height

Area of trapezium = Average of parallel sides x height

**Example**

Find the area of this shape?

Area of trapezium = ½ ×(3 + 12) × 10 = 7½ x 10 = **75 **sq. units