H0.2b Line Symmetry2
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Transcript of H0.2b Line Symmetry2
Symmetry:Symmetry:A Visual PresentationA Visual Presentation
A PowerPoint Presentation created by Mrs. Gamache using A PowerPoint Presentation created by Mrs. Gamache using the the collection of web pages created by the Adrian Bruce and students of collection of web pages created by the Adrian Bruce and students of
6B6Bhttp://www.adrianbruce.comhttp://www.adrianbruce.com
Line SymmetryLine Symmetry Shape has line symmetry when one halfShape has line symmetry when one half
of it is the mirror image of the other half.of it is the mirror image of the other half.
Symmetry exists all around us and many Symmetry exists all around us and many people see it as being a thing of beauty.people see it as being a thing of beauty.
Is a butterfly Is a butterfly symmetrical?symmetrical?
Line Symmetry exists in Line Symmetry exists in nature but you may not nature but you may not
have noticed.have noticed.
At the beach there are At the beach there are a variety of shells with a variety of shells with
line symmetry.line symmetry.
Under the sea there are also Under the sea there are also many symmetrical objects many symmetrical objects
such as these crabssuch as these crabs
and this starfish.and this starfish.
Animals that have Line Animals that have Line SymmetrySymmetry
Here are a few more great examples of Here are a few more great examples of mirror image in the animal kingdom.mirror image in the animal kingdom.
THESE MASKS HAVE THESE MASKS HAVE SYMMETRYSYMMETRY
These masks have a line of These masks have a line of symmetry from the forehead to the symmetry from the forehead to the
chin.chin.
The human face also has a line of The human face also has a line of symmetry in the same place.symmetry in the same place.
Human SymmetryHuman Symmetry
The 'Proportions of Man' The 'Proportions of Man' is a famous work of art is a famous work of art by Leonardo da Vinci by Leonardo da Vinci
that shows the symmetry that shows the symmetry of the human form.of the human form.
REFLECTION IN WATERREFLECTION IN WATER
If an object is If an object is reflected in water it reflected in water it
is considered to is considered to have line have line
symmetry along symmetry along the waterline.the waterline.
The Taj MahalThe Taj Mahal
Symmetry exists in architecture all Symmetry exists in architecture all around the world. The best known around the world. The best known example of this is the Taj Mahal.example of this is the Taj Mahal.
This photograph shows 2 lines of This photograph shows 2 lines of symmetry. One vertical, the other along symmetry. One vertical, the other along
the waterline.the waterline.
(Notice how the prayer towers, called minarets, are reflected in the (Notice how the prayer towers, called minarets, are reflected in the water and side to side).water and side to side).
2D Shapes and 2D Shapes and SymmetrySymmetry
After investigating the After investigating the following shapes by cutting following shapes by cutting
and folding, we found: and folding, we found:
an equilateral triangle has 3 internal an equilateral triangle has 3 internal angles and 3 lines of symmetry. angles and 3 lines of symmetry.
a square has 4 internal angles and 4 a square has 4 internal angles and 4
lines of symmetry. lines of symmetry.
a regular pentagon has 5 internal a regular pentagon has 5 internal angles and 5 lines of symmetry.angles and 5 lines of symmetry.
a regular hexagon has 6 internal angles a regular hexagon has 6 internal angles and 6 lines of symmetry . and 6 lines of symmetry .
a regular octagon has 8 internal a regular octagon has 8 internal angles and 8 lines of symmetry.angles and 8 lines of symmetry.