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Math Help - Three quarter circle problem...

  1. #1
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    Question Three quarter circle problem...

    My first post! I do have a question about three quarters of a circle perimeter question. It said the perimeter is 572. How do you separate the straight edges? What is the solution? Thanks for all your help!
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  2. #2
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    Re: Three quarter circle problem...

    Quote Originally Posted by evilgummybear View Post
    My first post! I do have a question about three quarters of a circle perimeter question. It said the perimeter is 572. How do you separate the straight edges? What is the solution? Thanks for all your help!
    1. Draw a sketch (or use a pizza and eat one quarter of it )

    2. The perimeter of three quarters of a circle consists of 2 radii and the corresponding arc which is 3/4 of the perimeter of a circle.
    Thus you have:

    2r + \frac34 \cdot 2\pi \cdot r = 572

    Solve for r.

    3. You should come out with r \approx 85.22
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