Rectilineal Shapes

Parallelogram and Trapezium

We should also be able to calculate the areas of trapezia and parallelograms. We can either do this by memorising a formula or by using common sense (or ideally using both).

Let’s try some composite shapes that include trapezia and parallelograms with the teacher.

Examples

Exercise

Question 6: Work out the area of each of these shapes:

Exercise

Let’s complete exercise 21 of page 29 of the core textbook:

Answers

The answers are below:

1. 42 cm²
2. 22 cm²
3. 103 cm²
4. 60.5 cm²
5. 143 cm²
6. 205 cm²
7. 1,820 cm²
8. 125.5 cm²