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Sooz Williams - ©2005Sooz Williams - ©2005
Sooz Williams - ©2005Sooz Williams - ©2005
What Is What Is Symmetry?Symmetry?
Symmetry = SameSymmetry = SameIf something has If something has symmetry it is the symmetry it is the SAME on both sidesSAME on both sides
Sooz Williams - ©2005Sooz Williams - ©2005
For For Example:Example:A butterfly A butterfly
has has symmetry.symmetry.
If you draw a If you draw a line down the line down the center of a center of a butterfly, butterfly, both sides are both sides are the same!the same!
Sooz Williams - ©2005Sooz Williams - ©2005
Some More Some More Examples:Examples:
Many kinds of Many kinds of food have food have symmetry!symmetry!
Many living Many living things have things have symmetry!symmetry!
Even people Even people have have
symmetry – symmetry – most of the most of the
time!time!
Sooz Williams - ©2005Sooz Williams - ©2005
Sometimes, even very Sometimes, even very complicated things complicated things
have symmetry:have symmetry:
Like this building! It is Like this building! It is called Aston Hallcalled Aston Hall
Sooz Williams - ©2005Sooz Williams - ©2005
the same!the same!The 2 sides are
The 2 sides are
symmetricasymmetrical!l!
Sooz Williams - ©2005Sooz Williams - ©2005
When the line of When the line of symmetry goes up symmetry goes up
and down,and down,
It is called It is called VERTICALVERTICAL symmetrysymmetry
Sooz Williams - ©2005Sooz Williams - ©2005
VERTICALVERTICAL
up and downup and down
Sooz Williams - ©2005Sooz Williams - ©2005
Another kind of Another kind of symmetry is symmetry is HORIZONTALHORIZONTAL
symmetrysymmetry
HorizontalHorizontal means means across, or side to across, or side to
sideside
Sooz Williams - ©2005Sooz Williams - ©2005
For Example:For Example:
Many common Many common objects have objects have
horizontal horizontal symmetry!symmetry!
This bow and This bow and arrow has arrow has horizontal horizontal
symmetry.!symmetry.!
This ladybug This ladybug has horizontal has horizontal
symmetrysymmetry
Sooz Williams - ©2005Sooz Williams - ©2005
HORIZONTALHORIZONTAL
side to sideside to side
Sooz Williams - ©2005Sooz Williams - ©2005
Sometimes, objects Sometimes, objects have have bothboth vertical vertical
and horizontal and horizontal symmetry:symmetry:
vertiverticalcal
AND AND horizontalhorizontal
Sooz Williams - ©2005Sooz Williams - ©2005
Can you see the Can you see the symmetry in this symmetry in this
pattern?pattern?
This object has This object has twotwo lineslines of of symmetrysymmetry
Sooz Williams - ©2005Sooz Williams - ©2005
Which of these Which of these patterns is patterns is
symmetrical?symmetrical?
Nope!Nope! Nope!Nope!Yes!Yes!(one line of symmetry)(one line of symmetry)
Sooz Williams - ©2005Sooz Williams - ©2005
This pattern is This pattern is notnot symmetrical!symmetrical!
Which of these Which of these patterns is NOT patterns is NOT symmetrical?symmetrical?
Sooz Williams - ©2005Sooz Williams - ©2005
Does this object have Does this object have verticalvertical symmetry or symmetry or horizontalhorizontal symmetry? symmetry?
BotBoth!h!
In fact, you In fact, you couldcould argue that argue that this object has 4 lines of this object has 4 lines of symmetry! (although not symmetry! (although not exactlyexactly))
Created by Sooz Williams - Created by Sooz Williams - ©2005©2005
Can you find Can you find symmetry in symmetry in
the world the world around you?around you?
Resources End Show
Sooz Williams - ©2005Sooz Williams - ©2005
ReferencesReferences Houghton, John and Rod Birch. "Aston Hall History." Houghton, John and Rod Birch. "Aston Hall History."
Aston History HomepageAston History Homepage. 2002. 19 Apr 2005 . 2002. 19 Apr 2005 <http://www.astonbrook-through-astonmanor.co.uk/i<http://www.astonbrook-through-astonmanor.co.uk/id77.htm>. d77.htm>.
All other graphics courtesy of All other graphics courtesy of Microsoft Office Clip Art OnlineMicrosoft Office Clip Art Online
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