# Symmetry review

CCSS Math: 4.G.A.3

Review symmetrical shapes and lines of symmetry. Then, try some practice problems.

## Line of symmetry

A $\greenD{\text{line of symmetry}}$ is a line where we can fold the image and have both halves match exactly.

**Example:**

When we divide the figure with Line $\greenD{A}$, the resulting two parts are mirror images of each other:

Line $\greenD{A}$ is a line of symmetry.

*Want to learn more about lines of symmetry? Check out this video.*

## Symmetrical figures

Shapes are $\purpleC{\text{symmetrical}}$ if they have at least one $\greenD{\text{line of symmetry}}$ on them.

**Example:**

This shape is $\purpleC{\text{symmetrical}}$:

Because we can draw at least one $\greenD{\text{line of symmetry}}$ on it:

*Want to learn more about symmetrical figures? Check out this video.*

## Practice

*Want to try more problems like this? Check out these exercises:*

Identify lines of symmetry and symmetrical figures

Draw lines of symmetry and symmetrical figures