Mathematics for IGCSE & O level - Mensuration (Section 7 - No. 12)
A shape is made from a combination of rectangles. How would you find the area?
Multiply the length by the width.
Add the areas of the individual rectangles.
Subtract the length from the width.
Divide the perimeter by 2.
Explication
The total area of a composite shape is the sum of the areas of its individual parts.