January 4

Rotational Symmetry

We’ve recently learned about rotational symmetry and how it’s different from line symmetry.

A shape has rotational symmetry when you turn it and the shape fits exactly onto itself. The number of positions in which the object looks exactly the same is called the order of the symmetry. If a shape only matches itself once as we go around (ie it matches itself after one full rotation) there is really no rotational symmetry at all.

Check out these websites for more helpful information, examples, and practice.

MathisFun

Try practicing here!

The following two tabs change content below.

MrsS

Latest posts by MrsS (see all)


Posted January 4, 2016 by MrsS in category 2015-2016, Math

4 thoughts on “Rotational Symmetry

  1. heatherjv

    Mrs.Sullivan,
    This post give me a better understanding of rotational symmetry. I also tried the website because I saw you using it on the smartboard. He video also gave me clear instructions and good math language which also helps me understand it better.
    Your student,
    Heather

    Reply
  2. Emma

    I really found that the practice drawing and Turing your shapes was helpful. It really worked with the shapes that were not regular or that I was unsure of.
    Your classmate,
    Emma

    Reply
  3. Gabi

    Dear Mrs. Sullivan,

    Before this year I did not know how rotational symmetry worked… I didn’t even know this type of symmetry was called “rotational”.

    From the website named https://www.mathsisfun.com/geometry/symmetry-rotational.html it says ‘because the word “Symmetry” comes from syn (together) and metron (measure), and there can’t be “together” if there is just one thing.’

    Some places you can find rotational symmetry in our everyday lives are:
    – chess/checker board
    – snowflake
    – air fans / turbines
    – dart board
    – car / bike wheels
    – recycle symbol

    Thank you Mrs. Sullivan for teaching us about rotational symmetry and how it is everywhere.

    -Gabi-

    Reply

Leave a Comment

Your email address will not be published. Required fields are marked *

*