Mathematics

Question

ind the area of a circle whose circumference is 31.4 centimeters. Approximate Π as 3.14.

2 Answer

  • 31.4/3.14=10
    10/2=5
    5*5*3.14= 78.5 cm square
  • The circumference of a circle is found by 2(pi)•r. To find r, set this equal to the circumference they gave you.

    31.4=2pi•r

    Divide by 2pi

    r=4.997

    The area of a circle is given by pi•r^2

    A=pi(4.997)^2

    A=78.460 cm^2
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