The area of a shape is a measure of the two dimensional space that it covers. A shape's area is measured in squares, eg square centimetres, square metres and square kilometres.

Part of

A square centimetre is the area within a square with sides of length , as shown above.

We say that it has an area of ( squared).

This rectangle contains six squares. Each of the squares has an area of , so the area of the rectangle is .

- Question
By counting the squares, find the area of the following shapes:

a)

b)

a)

b)

Remember, there are six whole squares and four half squares in the triangle.