Free practice on Areas and Perimeters for Class 4, following the Cameroon primary school curriculum (English subsystem). Every answer is explained, so a parent who is not sure of the answer can still help.
Perimeter is the distance ALL THE WAY around a shape. Add every side. A rectangle 5 cm by 3 cm has perimeter 5 + 3 + 5 + 3 = 16 cm. Or use 2 × (length + width) = 2 × 8 = 16 cm.
Area is the space INSIDE a flat shape, measured in square units. Rectangle area = length × width. Square area = side × side. A rectangle 5 cm × 3 cm has area 15 cm².
| Shape | Area formula |
|---|---|
| Rectangle | length × width |
| Square | side × side |
| Triangle | ½ × base × height |
A triangle's area = half × base × height. If the base is 8 cm and height is 5 cm: area = ½ × 8 × 5 = 20 cm². Think of it as half a rectangle.
A rectangle is 8 m long and 5 m wide. What is its area in square metres?
Write your answer, then check below.
Answer: 40
Area = length × width = 8 × 5.
A square has sides of 6 cm. What is its perimeter in cm?
Write your answer, then check below.
Answer: 24
Perimeter = 4 × 6 = 24 cm.
A rectangle is 9 m long and 4 m wide. What is its perimeter in metres?
Write your answer, then check below.
Answer: 26
Perimeter = 2 × (9 + 4) = 26 m.
A square farm has sides of 10 m. What is its area in square metres?
Write your answer, then check below.
Answer: 100
Area = 10 × 10.
The area of a triangle is:
Answer: B. ½ × base × height
The app holds every question on this page and hundreds more, works with no internet after the first load, and costs nothing. It fits on a shared phone.
