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Thread: math question

  1. #1
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    math question

    here is simple math question for one of you math whizzes area of this rectangle needs to be converted to a similar circle.. so here is the rectangle size...76" wide by 42" high what size is this in a diameter? thanks
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  2. #2
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    Hi Larry ,
    4 and 3/4" by my broken calculator...
    Shaz
    sorry, no clue...
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  3. #3
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    are you looking to lay out an elipse or a circle larry?
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  4. #4
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    you have a circumference of 236 inches, divided by pi (3.141592653589793238) = 75.12113313937459848 inches in diameter

    Thats my best guess

  5. #5
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    Diameter = 63 -3/4"
    Radius = 31 -7/8"

    (31-7/8) (31-7/8) 3.14 = 3191.9 Sq inches (the pie R squared equation)
    76 x 42 = 3192 sq inches

    Pretty close!!

    Tony, BCE '75

  6. #6
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    Piece of cake.... er pie anyway

    Area of a circle = PI * radius squared
    Re-arrange the formula to
    Area / PI = radius squared

    So divide your area by PI (3.1416...) then hit the square root button on your calculator to get the radius. If you want the diameter, multiply that by 2.
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  7. #7
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    thansk guys ,,,i got what i needed from yuall tod i am after a diameter to get some approx weight.. that is all thanks for ckun in sometime my finners dont think as well andmy noggen skips abeat
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

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