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Aashna Patel

on 5 September 2011

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Transcript of Symmetry

Symmetry Symmetry symmetry,
the easiest math there can be,
from line to rotational,
vertical to horizontal,
from a butterfly to a yummy pie,
people to a church's steeple,
a sqare and a circle,
symmetry is the way to go!

if 'ya see a figure,
and it can equally fold in half,
either side by side,
or up in down,
then it has symmetry

and if 'ya see a figure,
and you rotate it around,
90 180 270 360 degrees,
and it still looks the same,
well then guess what,
its got rotatational symmetry

symmetry symmetry,
the easiest math that there can be,
from line to rotational,
vertical to hosrizontal,
from a butterfly to a yummy pie,
people to a church steeple,
a squre and and a circle,
symmetry is the way to go Song (to the tune of price tag) Joseph Priestley was the man who is credited for discovering symmetry.He was very brilliant.He was also talented in other fields like chemistry,physics,electricity, philosophy,algebra and biology.
Joseph was born in 1733 in England to a cloth-maker. When he was young he was often ill and had to stay home instead of going to school.Despite this, he still became a very intellegent man.
Joseph believed that science, literature, math and the arts were just as important as religion and church. When he became older he made some important scientific discoveries. They included the discovery of oxygen and the fact that plants make there food from the sun in a process known as photosynthesis.
He published books on subjects such as grammar and states of electricity. Even as an old man he was still open to learning new things. In 1804, Joseph died. He will always be remembered as a smart and kind man. Real Life Example: How many lines of symmetry does this sea star have?

Background Info and Answer:
When scientists study Echinoderms, they know that some such as sea stars have radial symmetry. Radial symmetry is when lines of symmetry are around a single point. The picture above shows white lines as the different lines of radial symmetry and the black dot as the single point.The total amount of lines of symmetry are 5.Other examples of animals with radial symmetry include brittle stars and sand dollars. Mathmetician Letter to a Friend Dear Kyleigh,

When you were sick last week, in math, you missed the lessons on symmetry. Don't worry because symmetry will be a piece of cake for you!

Symmetry is basically when a figure can be divided, rotated, or folded in to different parts equally. Symmetry is not only used in math but also in science. There are two main types that you must know. These two types are line and rotational symmetry.

Line symmetry is very simple. It is when a figure can basically be split equally with aline or lines. Also make sure it can be folded equally. Rotational symmetry is when a figure is rotated at different angles and at 360 degrees it still looks the same.
This can be done either clockwise or counterclockwise. It is a bit harder than line symmetry, but is still manageable.

The best advice I can give you is to take your time. Don't rush if you think it is easy because you will make silly mistakes. Follow this and you will be prepared for the test.
Your Friend,
Aashna Art Piece Top 10 Tips 1. Make sure you read directions carefully.
2. Know the difference between clockwise and counterclockwise.
3. Take your time and don't rush even if it is easy.
4. Be careful at counting degrees. 5.Don't make silly mistakes.
6. Make sure you remember that lines of symmetry must also be able to fold equally.
7. Make sure that when you are rotating a figure you go all the way to 360 degrees.
8.Know the definitions of rotational and line symmetry well.
9.Know the difference between horizontal and vertical.
10.Don't be afraid to ask the teacher for help if you don't understand an assignment. The End :)
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