LEARN · PRACTISE · DISCOVER

Find Lines of Symmetry

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

Test whether a shape has line symmetry by checking if two halves match when folded or reflected.

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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.

1Square: 4 lines

The square has vertical, horizontal and two diagonal symmetry lines.

2Rectangle: 2 lines

This non-square rectangle has horizontal and vertical symmetry lines, but not diagonal ones.

3Mirror halves

The two halves must coincide after reflection across the proposed line.

4Check the exact shape

A centred line is not automatically a symmetry line. Exact geometry and approximate natural symmetry differ.

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. How many symmetry lines does a square have? 2 1 4

2. Does a non-square rectangle’s diagonal give matching folded halves? Only if the paper is purple No Yes

3. What is the test for a symmetry line? The reflected halves match The line looks long The shape has any equal sides

Read the answer explanations

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