TV on a Rolling Cart

Intro to Symmetry (Part 1) | What is Symmetry? | Lines of Symmetry

From Math with Mr. J

Intro to Symmetry (Part 1) | What is Symmetry? | Lines of Symmetry
4 min4thMath
access

Summary

What a line of symmetry is and how to find one in a shape. Mr. J folds shapes to test for symmetry.

Viewer safety

All ages

Our rating is a quick teacher-to-teacher guide — preview before showing.

Teaching resources

Discussion questions

A line of symmetry splits a shape into two matching halves.

  1. What makes a line a line of symmetry?
  2. How can folding test for symmetry?
  3. How many lines of symmetry does a square have?

Quick work-a-long

Words to know: symmetry, line of symmetry, halves

  • Draw a shape and all of its lines of symmetry.
  • Find a classroom object that has a line of symmetry.