O is the center of the circle and A, B, C are three points on the circle. Here OC or OA or OB is called as radius and AB is the diameter of the circle.
Example 1: If a circle is having an area of 254.34 sq. m then find the radius of the circle.
Given,
Area of the circle = A = 254.34 sq. m
Radius of the circle = r = ?
Hence the radius of the circle = r = 9 m
Example 2: Find the radius of a circle whose circumference is 68 sq. cm. Round to the nearest hundredths place.
Given.
Circumference of a circle = C = 68 sq. cm
Radius of a circle = r = ?
Formula,
