What is the circumference of a circle with a diameter of 16 in?

2 Answers
Sep 22, 2015

Answer:

#16pi#

Explanation:

We have that the circumference C is #pi*2r# or #pi*d#, that's because #pi# was defined as the ratio between the circumference and the diameter. So, axiomatically:

#C/d = pi#, therefore #C = pi*d#

Sep 22, 2015

Answer:

#C=50. "in"#

Explanation:

The formula for calculating the circumference of a circle is #C=pi * d#, where #pi# is #3.1415...# and #d# is the diameter.

#C=pi * 16"in"=50.265482457437 "in"=50. "in"# (with two significant figures)