AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!



In a plane, a figure has symmetry if there is an isometry, other than the identity, that maps the figure to itself.

Line Symmetry:

For each figure there is a line of symmetry such that the reflection
maps the figure onto itself.

Point Symmetry:

For each figure there is a point of symmetry such that a half turn
maps the figure onto itself.

Rotational Symmetry:

Each figure has a center and rotates the figure onto itself.

Translational Symmetry:

Translation that maps the figure onto itself. 


Subject X2: 

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!