Line of symmetry

1 video
2 skills
A line of symmetry for a two-dimensional figure is a line across the figure such that the figure can be folded along the line into matching parts. In this tutorial, we'll identify line-symmetric figures and draw lines of symmetry. Common Core Standard: 4.G.A.3

Introduction to reflective symmetry

VIDEO 2:47 minutes
Sal introduces the concept of an "axis of symmetry."

Identifying lines of symmetry and symmetrical figures

PRACTICE PROBLEMS
Draw and identify lines of symmetry. Create and identify symmetrical shapes.

Drawing lines of symmetry and symmetrical figures

PRACTICE PROBLEMS
Practice drawing lines of symmetry and creating symmetrical figures.