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Mathrocks4me

  • 3 years ago

The pizza has a diameter of 12 inches. What is the closest to the area of the pizza? a. 432 square inches b. 168 square inches c. 108 square inches d. 72 square inches

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  1. Wired
    • 3 years ago
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    Area of a circle = pi*r^2, 2r = diameter

  2. danny_dumond
    • 3 years ago
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    2*3.14*6

  3. danny_dumond
    • 3 years ago
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    ohhh yup ur right

  4. danny_dumond
    • 3 years ago
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    2pi r

  5. Wired
    • 3 years ago
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    @danny_dumond You posted the formula for the circumference, not the area.

  6. Mathrocks4me
    • 3 years ago
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    Cool. I keep forgetting to multiply by 2....thanks guys. C=pi*d Area of a circle=A=pi*r^2

  7. danny_dumond
    • 3 years ago
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    yes i just realized sorry

  8. Wired
    • 3 years ago
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    2r = diameter r = (diameter/2) \[\pi*(\frac{diameter}{2})^{2} = \]

  9. Mathrocks4me
    • 3 years ago
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    Did you get 113.04?

  10. Wired
    • 3 years ago
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    Yep. If you use 3 as pi you'll get 108.

  11. Mathrocks4me
    • 3 years ago
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    Thanks!!!

  12. Wired
    • 3 years ago
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    No problemo

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