basic properties of trapezoids trapezoids on the brain trapezoids in our world
TRANSCRIPT
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Basic Properties of Trapezoids
Trapezoids on the Brain
Trapezoids in Our World
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It’s me, Trapezoid!
Take a good look; what do you see?My interior angles add up to 360°.
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I have one set of parallel lines.
It’s me, Trapezoid!
What else do you notice?
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Are you seeing triangles?
This trapezoid is made up of 5 congruent triangles –
Look closely…what patterns do you see?
Trapezoids can be formed using various combinations of shapes…
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How many right triangles are used to build this trapezoid?
Can you think of a different way to divide a trapezoid into triangles?
Are you seeing triangles?
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Calculate the area of this trapezoid,
or this one?
This trapezoid certainly looks less intimidating!
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The Trapezoidal Prism: Because Life is not two-
dimensional!A handy application…
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The Trapezoidal Prism: Because Life is not two-
dimensional!
Tempe Municipal Building, Arizona
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Trapezoidal Prism?
Absolutely!
See for yourself:
1. Cut an elongated trapezoid out of a piece of paper:
2. Stick slanted edges of trapezoid together with tape
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Who knew trapezoidal prisms could be ‘chic’ and functional?
The designer of this watch chose to use a trapezoidal prism on the outside of thiswatch face.
Why?
So the numbers are readable when looking straight
down!
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Next time you walk into your house, take a look at the door and window
frames.
You’ve been living with trapezoids your whole life,
you just never knew it!