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5th grade math

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The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long?

Also to find the circumference of a circle do you use the radius or diameter x 3.14?

  • 5th grade math -

    The diameter of a penny is 3/4 in. How many pennies are needed to form a row 12in. long?

    12 divided by 3/4

    Also to find the circumference of a circle do you use the radius or diameter x 3.14?

    The circumference of a circle is

    3.142 x diameter

    or

    2 x 3.142 x radius

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