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anonymous

  • one year ago

HELP WILL MEDAL AND FAN! Find the area of the circle: Inner radius is 4cm, Outer radius is 9cm.

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  1. anonymous
    • one year ago
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    Here are the options. A) 78.5cm^2 B) 31.4cm^2 C) 157cm^2 D) 204.1cm^2

  2. ganeshie8
    • one year ago
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    are you trying to find the area of region between below two circles ? |dw:1440600185673:dw|

  3. Astrophysics
    • one year ago
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    Note the area for a circle is \[A_{circle} = \pi r^2\]

  4. anonymous
    • one year ago
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    The diagram I was given asked me to figure out the area of the shaded region of the circle it showed me. The entire ring of the circle was faded in, but the middle part with the hole was not. To answer your queston yes I think.

  5. Astrophysics
    • one year ago
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    |dw:1440600531344:dw| so like this

  6. anonymous
    • one year ago
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    Yes except colored all the way in the ring part.

  7. ganeshie8
    • one year ago
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    |dw:1440600652512:dw|

  8. Astrophysics
    • one year ago
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    Show off!

  9. ganeshie8
    • one year ago
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    definitely! ;)

  10. anonymous
    • one year ago
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    Yes the bottom one looks like it.

  11. ganeshie8
    • one year ago
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    there is a little trick to get that black area

  12. ganeshie8
    • one year ago
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    do u remember how to find area of full circle ?

  13. anonymous
    • one year ago
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    Nope.

  14. ganeshie8
    • one year ago
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    you will need to know that before attempting this problem

  15. ganeshie8
    • one year ago
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    lets do a quick problem maybe

  16. anonymous
    • one year ago
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    K

  17. ganeshie8
    • one year ago
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    Find area of region interior to below circle of radius 3 units : |dw:1440600874779:dw|