LEARN · PRACTISE · DISCOVER

Find the Perimeter

Read at your own pace. Try the practice, then continue your course.

Find the distance around a shape by adding its side lengths, and report perimeter in matching length units.

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THE CURIOSI · EXPLORE & TRY

Explore the model, then test your understanding. Select each numbered stop to discover its role.

Learning diagram: use the labelled values. Screen size changes, so these pictures are not calibrated measuring tools.

1Top 5 cm

Start at a corner and count the top edge once.

2Right 3 cm

Continue along the right boundary.

3Bottom 5 cm

Opposite sides of this rectangle have equal length.

4Left 3 cm

Return along the left edge: 5 + 3 + 5 + 3 = 16 cm.

Use matching units and the stated properties. Explain whether your answer measures length, area or volume.

Choose one answer for each question, then check. Practice results stay on this page and do not change course completion.

1. What is this rectangle’s perimeter? 16 cm 15 cm² 8 cm

2. Which unit fits perimeter? Square centimetres Cubic centimetres Centimetres

3. Do internal grid lines count toward perimeter? Only vertical ones No Yes, always

Read the answer explanations

For hands-on practice, use a real ruler, square paper or blocks. Keep units visible and explain your method.