Math 4 · Unit 14: Area and perimeter · Cambridge Primary Maths Stage 4

Questions

1. 1. Worked example: a triangle has sides of 3 cm, 4 cm and 5 cm. What is its perimeter?

   • 7 cm
   • 60 cm
   • 12 cm²
   • 12 cm
   Check

2. 2. A rectangle has lines of 4 cm, 2 cm, 4 cm and 2 cm. Add the lengths to find the perimeter.

   • 16 cm
   • 6 cm
   • 12 cm
   • 8 cm
   Check

3. 3. The castle walls are 14 m, 12 m, 14 m and 12 m long. What is the perimeter?

   • 168 m
   • 52 m
   • 26 m
   • 48 m
   Check

4. 4. These 8 squares are each 1 cm by 1 cm. What is the area of the shape?

   • 16 cm²
   • 4 cm²
   • 8 cm
   • 8 cm²
   Check

5. 5. Count the squares that have over half shaded to estimate the area of shape A.

   • 7 cm²
   • 4 cm²
   • 5 cm²
   • 10 cm²
   Check

6. 6. Count the squares that have over half shaded to estimate the area of shape B.

   • 5 cm²
   • 7 cm²
   • 14 cm²
   • 9 cm²
   Check

7. 7. Count the squares that are over half shaded in shape A and in shape B. Add the areas together to estimate the total shaded area.

   • about 12 cm²
   • about 35 cm²
   • about 12 cm
   • about 2 cm²
   Check

8. 8. Measure rectangle a: it is 5 cm long and 3 cm wide. What is its perimeter?

   • 8 cm
   • 16 cm
   • 15 cm
   • 16 cm²
   Check

9. 9. Measure rectangle b: it is 2 cm wide and 7 cm long. What is its perimeter?

   • 18 cm
   • 18 cm²
   • 9 cm
   • 14 cm
   Check

10. 10. Measure rectangle c: it is a square with sides of 4 cm. What is its perimeter?

    • 4 cm
    • 16 cm²
    • 8 cm
    • 16 cm
    Check

11. 11. The park's sides are 15 m, 20 m, 12 m, 8 m and 10 m. How long is the perimeter fence?

    • 65 cm
    • 65 m
    • 55 m
    • 57 m
    Check

12. 12. Which of these is one way to divide the 6 by 6 square into four sections of 9 cm²?

    • six 1 by 6 strips
    • four 2 by 4 rectangles
    • two 6 by 3 rectangles
    • four 3 by 3 squares
    Check

13. 13. Count the squares that are over half shaded to estimate the area of shape A.

    • 6 cm²
    • 10 cm²
    • 5 cm²
    • 12 cm²
    Check

14. 14. Count the squares that are over half shaded to estimate the area of shape B.

    • 8 cm²
    • 4 cm²
    • 6 cm²
    • 14 cm²
    Check

15. 15. Shape A has an area of about 6 cm² and shape B about 8 cm². Add the areas together to estimate the total shaded area.

    • about 14 cm²
    • about 2 cm²
    • about 48 cm²
    • about 14 cm
    Check

16. 16. This right-angled triangle has sides of about 35 mm, 50 mm and 61 mm. What is its perimeter in millimetres?

    • about 200 mm
    • about 146 mm
    • about 14.6 mm
    • about 85 mm
    Check

17. 17. Count the squares that are over half shaded in all four shapes. Estimate the total shaded area.

    • about 20 cm²
    • about 9 cm²
    • about 25 cm²
    • about 16 cm²
    Check

18. 18. The castle wall has sides of 20 m, 5 m, 14 m, 5 m, 16 m, 6 m, 10 m and 6 m. What is the perimeter of the castle wall?

    • 36 m
    • 82 m
    • 92 m
    • 72 m
    Check