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acres in a circle

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  • acres in a circle

    My circle has a diameter of 900 ft. How many acres?

  • #2
    Re: acres in a circle

    The formula for the area of a circle is:

    Area = Pi * radius

    Pi * (900/2) = 636172.5

    So its about 636172.5 square feet, we then convert that to acres on the Area conversion page, or just divide by 43560.

    636172.5 / 43560 = 14.6 acres

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    • #3
      Re: acres in a circle

      circle is 2881 feet long at longest point. how many acres is this?

      Comment


      • #4
        Re: acres in a circle

        Originally posted by Unregistered View Post
        circle is 2881 feet long at longest point. how many acres is this?
        If it's actually a circle, use the formula given above by Robert. If 2881 is the diameter, simply divide by 2 for the radius.

        From your post, I'm not sure you have an actual circle. If not, we need more information before we can give you an answer.

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        • #5
          Re: acres in a circle

          Pi(R)= area
          3.14 * 900= area
          3.14 * 810,000= 2,543,400

          ft/acre= 43560

          2,543,400/43560= 58.39

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          • #6
            Re: acres in a circle

            Originally posted by Unregistered View Post
            Pi(R)= area
            3.14 * 900= area
            3.14 * 810,000= 2,543,400

            ft/acre= 43560

            2,543,400/43560= 58.39
            You (probably inadvertantly) used diameter in your calculation instead of radius. When using diameter instead of radius, either divide Pi by 4 or divide diameter by 2 to get radius.

            Robert's answer is correct.
            Last edited by Dirtman; 07-07-2010, 08:56 AM.

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            • #7
              Re: acres in a circle

              my area is 3607 feet around how many acres in that area

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              • #8
                Re: acres in a circle

                the perimeter is 6583 ft. how many acres?

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                • #9
                  Re: acres in a circle

                  Originally posted by Unregistered View Post
                  the perimeter is 6583 ft. how many acres?
                  The radius is 6583 ft/(2*pi) = 1047.7 ft
                  Area = pi*r = 3 448 560.5 ft
                  1 acre = 43560 ft, so 79.2 acre

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                  • #10
                    Re: acres in a circle

                    How many acres for a 1338 ft cir le

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                    • #11
                      Re: acres in a circle

                      Originally posted by Unregistered View Post
                      How many acres for a 1338 ft cir le
                      pi*(1338ft/2) = 1406064 ft
                      at 43560 ft/acre, 32.3 acre

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                      • #12
                        Re: acres in a circle

                        The radius of the circle is 180 feet. How many acres is the circle?

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                        • #13
                          Re: acres in a circle

                          Originally posted by Unregistered View Post
                          The radius of the circle is 180 feet. How many acres is the circle?
                          Area = pi * R = 101787.6 ft
                          An acre is 43560 ft, so 2.34 acre.

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                          • #14
                            Re: acres in a circle

                            ok, the area of the circle is 20 acres. What is the radius?

                            Since I don't know how to do the equasions an explaination would help for future projects.

                            Anyone interested in helping me with the answer to this and to the explaination can e-mail me at [link removed ]

                            Scott

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                            • #15
                              Re: acres in a circle

                              Originally posted by Unregistered View Post
                              ok, the area of the circle is 20 acres. What is the radius?

                              Since I don't know how to do the equasions an explaination would help for future projects.

                              Anyone interested in helping me with the answer to this and to the explaination can e-mail me at [link removed ]

                              Scott
                              an acre is 43560 ft, so 20 acres is 871 200 sq ft

                              The area of a circle is pi*r, so divide by pi (3.14159) and take square root,
                              526.6 ft radius

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