Year 7 Perimeter Practice

Name:

Date:

📐 Part 1: Basic Perimeter Calculations

1. Calculate the perimeter of a rectangle with length 8 cm and width 5 cm.

Perimeter = _______ cm

2. A square has sides of 12 metres. What is its perimeter?

Perimeter = _______ metres

3. Find the perimeter of a triangle with sides measuring 7 cm, 9 cm, and 11 cm.

Perimeter = _______ cm

4. Which formula is correct for finding the perimeter of a rectangle?

P = length × width

P = 2 × (length + width)

P = length + width

P = 4 × length

🏗️ Part 2: Composite Shapes & Word Problems

5. A rectangular garden bed is 15 metres long and 8 metres wide. How much fencing is needed to go around the entire garden?

Answer: _______ metres of fencing

6. Sarah wants to put a border around her square bedroom floor. Each side of the room is 4.5 metres. How many metres of border does she need?

Answer: _______ metres

7. A composite shape is made from a rectangle (6 cm × 4 cm) with a square (3 cm × 3 cm) attached to one side. Draw the shape below and calculate its perimeter.

Perimeter = _______ cm

8. A triangular park has sides of 120 metres, 85 metres, and 95 metres. The council wants to install a walking path around the perimeter. What is the total length of the path?

Answer: _______ metres

🎯 Part 3: Problem Solving

9. A rectangular swimming pool has a perimeter of 40 metres. If the length is 12 metres, what is the width?

Width = _______ metres

10. Explain in your own words how to find the perimeter of any polygon (many-sided shape).

11. A farmer has 200 metres of wire fencing. He wants to make a rectangular paddock that is 45 metres long. Is there enough fencing? Show your working.

Answer: _____________________________________________