Tuesday, May 16, 2006

TrixiE's growing post

1.) What is meant by the terms "Rotation Symmetry" and "Reflection Symmetry"? How does this relate to pentominoes? Explain these terms so that anyone who reads your post understands what you mean.

Rotation Symmetry is when a figure can be rotated so that it fits exactly onto its outline more than once in a complete turn, it has rotational symmetry.
Reflection Symmetry is if a figure or object looks the same after being reflected in a mirror, then it has reflectional symmetry. The line where you must put the mirror for this to work is called the line of symmetry (or in 3D, the plane of symmetry).

2.) Create a pattern. You must represent this pattern both pictorially (i.e. with a picture or diagram) and with numbers. You must show the first 4 steps of your pattern.

Shape #1

Shape #2

Shape #3

Shape #4

3.) Describe in words what is occuring with your pattern and if your pattern has an ending or if it continues on indefinately. Make sure that your explanation is clear enough that the person reading your description could understand your pattern without seeing your diagram.

My shape is a small letter L . First I started at two squares then the next shape becomes longer by adding one square at the bottom. You'll just do it again and again.

4.) Create a T-Chart that shows what is happening with your pattern. You must show the first 4 steps of your pattern with the T-chart.

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At 12:15 PM, Blogger Mr. Reece said...

trixie I'm not sure who you are so I cannot grade this work. Please tell me who you are in class.
Mr. R

At 1:27 PM, Blogger Mr. Reece said...

Trixie you didn't tell how rotation and reflection symmetry relate to pentominoes. Your description of your pattern could use a bit of work.

Your mark is 17/18


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