The Wonderful World of Circles

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The Wonderful World of Circles

• by
• Jonathan, Steven, and Kyle

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2-d Circles

• Flat
• Diameter
• Radius
• Arch
• pi

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Measuring a Circle

• Circumference
• Pi d or 2pi r
• Area
• Pi r squared

Click here for chart of circle measurements
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Cylinders

• Height
• Base
• Radius
• Diameter
• Pi

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Measuring cylinders

• Volume
• Formula pi r squared height
• Surface area
• Formula 2pi r squared

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3-d spheres

• Volume
• Pi
• Radius
• Diameter
• Surface area

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Measuring spheres

• Volume
• 4/3 pi r squared
• Surface area
• 4pi r squared

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Pi

• It equals about 3.14
• You use it to find circumference, area, volume,
  and surface area of a circle

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Comprehension questions

• What is surface area?
• What is the formula for the area of a sphere?
• How do you find the volume of a cylinder?
• How do you find the surface area of a sphere?
• How do you find the surface area of a cylinder?

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Works cited

• www.cours-pi.com
• en.wikipedia.org
• www.circle-exhibitions.com
• www.mycherishedpet.com
• www.lisasgraphicsandmore.com
• mathworld.wolfram.com
• abyss.uoregon.edu
• www.denibonet.com
• www.1728.com/circle.gif