Question

find the radius of the circle with given the circumference-31.2cm​

Answer 1

Answer:

Circumference of circle,

<br>

<br>

<br> So, radius of circle is

cm.<br> Area of circle,

<br>

Answer 2

Answer:

The three primary characteristics of a circle are its circumference, diameter and radius. All circles share common properties that allow for formulas that relate these characteristics to one another. For example, the famous number pi (approximately 3.14, or a bit more precisely, 3.14156) is the ratio of a circle's circumference to its diameter, and this ratio holds true for all circles. It is also true that a circle's circumference has a specific relationship with its radius, and this means that there is a simple formula for calculating the radius of a circle if you know its circumference.