Question

A mountain bike wheel has a diameter of 26 in.

What is the approximate circumference of the wheel?
Use pi star times = 3.14.
Express your final answer to the nearest hundredth.

in. ?

Answer 1

google circumference of a circle formula

Answer 2

C=2πr

Answer 3

26 x pi x 2 = 163.28

Answer 4

that formula works if you use the radius

Answer 5

163.28 / 2 = 81.64

Answer 6

81.64 is my answer?

Answer 7

diameter = 26
radius = 13 (divide diameter by 2)

Answer 8

C = pi*d

or

C = 2*pi*r


C = circumference of the circle
pi = 3.14 approximately
d = diameter
r = radius