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March 29, 2017

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Find the circumference of a circle whose diameter is 2xR=4.2 ft. Use Pi = 3.14, and round the result to the nearest tenth.

would this be 3.14*2*4.2ft?

  • Geometry - ,

    This is a little tricky.
    Let R = the radius
    Let Pi = 3.14 as stated.
    The circumference is (Pi)(2)(R)
    The problem already calculates (2)(R) for you as 4.2 ft.
    So,
    circumference = (Pi)(4.2)
    or
    =(3.14)(4.2) ft.
    Multiply and round as requested by the problem.

  • Geometry - ,

    No wonder I kept getting a weird answer thank you for clarifying for me...

  • Geometry - ,

    Your welcome!
    Glad to help.

  • Geometry - ,

    (3.14)(4.2)=13.188
    would I round that to 13.19?

  • Geometry - ,

    No, the problem requests to the nearest tenth which would be:
    13.2 ft.
    Also, don't forget the units.

  • Geometry - ,

    ok thank you u r a lifesaver

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