Question

The circumference of a circle is 16 ft.
The radius is ?

Answer 1

Radius ≈ 2.55 ft.

Explanation:

GIVEN :-

• Circumference of circle = 16 ft.

TO FIND :-

• Radius of the circle

FORMULAE TO KNOW BEFORE SOLVING :-

For a circle with radius 'r' & circumference 'c' ,

`r = (c)/(2\pi )`

SOLUTION :-

`Radius = (Circumference)/(2\pi ) = (16)/(2\pi ) = (8)/(\pi ) = 2.55 ft. (appx)`

Answer 2

8/pi or approximately 2.55 ft

Explanation:

The formula for the circumference is

C = 2 * pi *r

16 = 2 * pi *r

Divide each side by 2 pi

16 / ( 2 pi) = 2 * pi * r/ ( 2 pi)

8 / pi = r

Using 3.14 for pi

8 / 3.14 = r

2.54777 = r

2.55 =r