Which circle is largest? (1 in= 2.54cm). circle a: diameter- 8in., circle b: circumference= 20in or circle c: radius= 13 cm

C. Radius = 13cm

Circumference = pi(2r)
C = 3.14(2x13cm)
C = 81.64cm x 1in/2.54cm = 32 in

Pi / 3.14
Where pi is defined as the ratio of a circle’s circumference divided by the diameter of the its circle. Pi has a value which is 3.1416. This pi is a constant value expressed by the quotient of its circumference over the diameter. What type of number best describes the diameter is the pi. Hence, if we describe the diameter, diameter is the quotient of pi over the circumference of a circle by itself. It can’t change in value since for every solution and quotient of a circle each calculation gets 3.14 more or less.

Iknow one of the answers is a and maybe b but not 100% sure about b