Question

The circumference of a circle is C centimeters.The diameter of the circle is 13 centimeters .

Answer 1

Answer: OPTION C.

π =
`(C)/(13)`

Explanation:

To find the expression that best represents the value of π if the circumference of a circle is C centimeters and the diameter of the circle is 13 centimeters, we will follow the steps below;

Write the formula for finding the circumference of a circle

c = 2π r

where c is the circumference of the circle and r is the radius of the circle

from the question given, diameter d is 13 cm

but d= 2r which implies r=d/2

r = 13/2

c = 2πr

c=2×π×
`(13)/(2)`

At the right-hand side of the equation, 2 will cancel-out 2

c= 13π

divide both-side of the equation by 13

`(C)/(13)` = π

π =
`(C)/(13)`