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Math 4: Symmetry 93 Views
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Description:
Symmetry is when one half of a shape or object is exactly the same as the other half. As in the case of David Beckham's sickeningly perfect face.
Transcript
- 00:12
Say hello to the Shmoop softball team, they're ready to play their first game on their brand spanking new field. [Girl holding up a softball]
- 00:19
Except, there’s one little problem… [Girl looks upset]
- 00:21
… this baseball diamond is seriously lacking in symmetry. [The field is not square]
- 00:24
What's symmetry you ask? It's when one half of a shape or object is exactly the same as the other
- 00:30
half.
Full Transcript
- 00:31
Basically when something is symmetrical, it’s like one side is the mirror image of the other.
- 00:35
Think of butterfly wings they're almost always symmetrical. [Butterfly lands on a plant]
- 00:38
The imaginary line going through the object separating the two identical halves is called [Dino pointing at a blackboard]
- 00:42
the “Line of Symmetry.”
- 00:44
As you can see, lines of symmetry can be vertical, horizontal or even diagonal. [An X on a treasure map]
- 00:48
It’s easy to see the symmetry in shapes, of course.
- 00:51
And you can see the equivalent of these shapes in the real world, as well, such as in a football [Symmetry lines are drawn on shapes]
- 00:55
field, a boxing ring, or, of course, a baseball field. [Symmetry lines drawn onto a boxing ring]
- 00:58
You can see symmetry at work in lots of man-made things like buildings and clothes. [Symmetry lines on the Eiffel tower]
- 01:01
You can even find symmetry in your favorite foods.
- 01:04
Hmmm, anyone gonna eat that PB and J?
- 01:06
But it’s not just athletes, architects, clothing designers and math teachers that
- 01:10
love symmetry. [Teacher eating a cake]
- 01:11
Turns out Mother Nature’s quite a fan, too.
- 01:13
You don’t even have to look that hard to find symmetry in nature – like the butterflies,
- 01:16
we talked about earlier, oh and leaves, flowers and the inside of a honeycomb, etc, etc, etc... [Pictures of leaves, flowers etc]
- 01:22
In fact, once you’re aware of it, you’ll begin to see symmetry all around you! [Peacock]
- 01:28
See? Mind blowing. [Man looks shocked]
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