SymmetrySymmetryBy: Marley Poku-KankamBy: Marley Poku-Kankam

Mr. Barbers ClassMr. Barbers ClassJanuary 2012January 2012

(Happy New Year!!) (Happy New Year!!)

What are some types of symmetry?What are some types of symmetry?

There are two types of symmetry that I will show in this PowerPoint: There are two types of symmetry that I will show in this PowerPoint: radial symmetry (or rotational symmetry) and bilateral symmetry (or radial symmetry (or rotational symmetry) and bilateral symmetry (or line symmetry).line symmetry).

Rotational symmetry is when you turn a figure to a certain degree Rotational symmetry is when you turn a figure to a certain degree between 0 and 360 and it looks the same as it did before you turned between 0 and 360 and it looks the same as it did before you turned it.it.

Line symmetry is when you fold a figure directly in half either Line symmetry is when you fold a figure directly in half either vertically or horizontally and both sides exactly match up after the vertically or horizontally and both sides exactly match up after the figure is folded.figure is folded.

Rotational SymmetryRotational Symmetryin everyday in everyday objects….objects….

Rotational SymmetryRotational Symmetry

This is one of my little brothers’ footballs. This was found in my den. My brothers play a lot of football in the house especially now since it’s playoff season! (We had to rotate the picture a bit to get the symmetry line straight!)

Order = 2 Degree = 180

Rotational SymmetryRotational Symmetry

This is a sound maker that we used on New Years Eve. We made a ton of noise with these as we were bringing in the new year!!

I found this in my den.

Order = 2 Degree = 180

Rotational SymmetryRotational Symmetry

This a candle in the shape of a star. I found this in our cabinet with candles. My mom loves, loves, loves candles! The better they smell, the more she loves them!

Order = 5 Degree = 72

Rotational SymmetryRotational Symmetry

This is a coffee filter that we use to make coffee. I found this in my kitchen next to my coffee maker. My mom and dad love coffee. (My mom helped me draw all of the arrows!)

Order = 24 Degree = 15

Rotational SymmetryRotational Symmetry

This is a candle. I found this in my moms work area.

Order = Infinite Degree = 359

This shape is a little different because every little bit you turn it, it will be exactly the same as when you started.

Line SymmetryLine Symmetryin everyday in everyday objects….objects….

Line SymmetryLine Symmetry

This is a magnetic lower case “t” that came off of my fridge in the kitchen. My little brother, Moses plays with lots of letters on the fridge so he can learn then and someday, learn to read!

This shape has one line of symmetry.

Line SymmetryLine Symmetry

This is the same star that has rotational symmetry but it also has one line of symmetry.

Line SymmetryLine Symmetry

This is a tin box that my dance teacher gave us filled with Christmas candies that she made. I found this in my kitchen.

It has one line of symmetry.

Line SymmetryLine Symmetry

This is the top to our sugar canister in the kitchen pantry.

It has two lines of symmetry.

Line Symmetry Line Symmetry

This is the same candle that has infinite rotational symmetry. It also has two lines of symmetry if you assume that the wick is straight up and you can cut it in half.

THE END !!!!THE END !!!!I would like to thank my mom for helping me draw the I would like to thank my mom for helping me draw the

lines on the shapes. Thanks Mommy!lines on the shapes. Thanks Mommy!