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Rotational Symmetry with Cookie Cutters

Exploring rotational symmetry with cookie cutters

Exploring rotational symmetry with cookie cutters.

Bruce had homework regarding rotational symmetry and it totally confused me because I’m really bad at visual-spatial things.

What is rotational symmetry? That means a shape that can be rotated less than 360 degrees and still look the same.  More info right here.

For spatially challenged people like me (you should see me parallel park!), rotational symmetry can be hard to picture. Hands-on learning can help.

A long time ago, I blogged about using flour and cookie cutters to learn about flips and turns. Guess what? That idea also works for rotational symmetry too!

First draw the X and Y axis in the flour.

First draw the X and Y axis in the flour. Then start experimenting.

This butterfly does NOT have rotational symmetry.

This butterfly does NOT have rotational symmetry.

Neither does the shamrock. It does not look the same until a 360 turn.

Neither does the shamrock. It does not look the same until a 360 turn.

A circle definitely has rotational symmetry. But this one's pretty obvious.

A circle definitely has rotational symmetry. But this one’s pretty obvious.

A little bit of masking tape and this becomes more interesting.

A little bit of masking tape and this becomes more interesting.

At 180 degrees, this shape has rotational symmetry.

At 180 degrees, this shape has rotational symmetry.

A word to the wise: this activity is messy! It’s the perfect example of something that would be really hard to do with thirty fifth graders in a classroom, but doable with your child at home.

Just be sure to have a vacuum ready!


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