Sophia Learning
Sophia: Rotational Symmetry: Lesson 11
This lesson explains the concept of symmetry as the object is rotated around a central point. It is 11 of 11 in the series titled "Rotational Symmetry."
Sophia Learning
Sophia: Rotational Symmetry: Lesson 3
This lesson explains the concept of symmetry as the object is rotated around a central point. It is 3 of 11 in the series titled "Rotational Symmetry."
Khan Academy
Khan Academy: Other Cool Stuff: Snowflakes, Starflakes, and Swirlflakes
Unusual variations on the paper snowflake.