Find the circumference of a circle if its radius is 2.25 dm. Calculate the diameter of this circle.

univerkov | May 3, 2021 | education

Find the length of the circle if its radius is 2.25 in.

The circumference is found by the formula l = 2 * pi * R, where pi is the number pi, equal to 3.14 (since it is said to be rounded to hundredths), R is the radius of the circle.

l = 2 * pi * R = 2 * 3.14 * 2.25 = 14.13 dm.

Calculate the diameter of this circle.

The radius of a circle is half of its diameter, hence the diameter of a circle is equal to two of its radii.

D = 2 * R = 2 * 2.25 = 4.5 dm.

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