A circle has a radius of 2 cm. What is the area of the circle?

1 Answer
Athleticbrainiac
Sep 15, 2016

The area of the circle is #4pi# or #12.5663706143591721...#

Explanation:

First, start off by writing the formula for the area of a circle.

#A=pir^2#
Substitute for the variables
#r=2#, thus
#A=pir^2# would be
#A=pi2^2#
#A=pi4#

Answer: Either #4pi# or #12.5663706143591721...#

For the final answer its up to you to decide whether you should wrote out the entire number ( in some cases you might be asked to round) or keep it as #pi#.

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