If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Symmetry review

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

Line of symmetry

A line of symmetry is a line where we can fold the image and have both halves match exactly.
When we divide the figure with Line A, the resulting two parts are mirror images of each other:
Line A is a line of symmetry.
Want to learn more about lines of symmetry? Check out this video.

Symmetrical figures

Shapes are symmetrical if they have at least one line of symmetry on them.
This shape is symmetrical:
Because we can draw at least one line of symmetry on it:
Want to learn more about symmetrical figures? Check out this video.


Problem 1
In the figure below, which of the following is a line of symmetry?
Choose all answers that apply:

Want to join the conversation?