Find the radius and diameter of a circle if its length is 63.428 dm

To calculate the radius and diameter of a circle, we will use the formula for the circumference of a circle through the radius.

The circumference is equal to twice the product of the radius and π.

Formula for calculating the circumference in terms of the radius:

C = 2πr,

Where

C – circumference,

r is the radius of the circle.

Thus, the formula for calculating the radius will be:

r = C / 2π;

r = 63.428 / 2 3.14 = 63.428 / 6.28 = 10.1 cm.

The diameter of a circle is equal to its two radii:

d = 2r;

d = 2 x 10.1;

d = 20.2 cm.

Answer: the radius of the circle is 10.1 cm, the diameter is 20.2 cm.