Lines of Symmetry
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Objective
I can identify and apply lines of symmetry in geometric figures.
Part 1 of 4
Warm-up video
mathantics · 11:45Vetted channel
We don't generate video — this one is by mathantics on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
Line symmetry is also known as reflection symmetry or mirror symmetry.
- 2
Rotational symmetry means that a shape can be rotated a certain amount and match the unrotated shape.
- 3
The order of rotation is how many times the shape matches in a complete rotation, and the angle of rotation is the smallest angle needed to rotate a shape for it to match the starting shape.
Part 3 of 4
Practice
7 questions
What is another name for line symmetry?
Explain the difference between a vertical and horizontal line of symmetry.
Part 4 of 4
Exit ticket
Quick comprehension check
“Draw a rectangle and draw all of its lines of symmetry.”
Sample answer included in the free materials
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Teacher guide, student handout, and slides — free, in Google Docs format
Teacher Guide
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