We should be able to calculate the areas of rectangles and triangles. By this stage in your mathematics journey it is crucial that you have memorised the formulae to do this as we will now start to look at geometry with more complicated shapes.

Let’s try calculating areas of some composite shapes made from rectangles and triangles with the teacher:

Examples made from Rectangles

Examples made from Rectangles and Triangles

Exercise

Let’s complete exercises 19 and 20 from pages 27 and 28 of the core textbook:

The answers are below: