Equal to the area. Area of circle is
[tex] \pi r^2[/tex]
This equals to [tex] 4 \pi [/tex] due to 2^2.
Circumference is [tex]2 \pi r[/tex]
This equals to [tex]2 \pi (2)[/tex]
When you multiply the 2 and the radius together, they equal to 2^2.
Which results to [tex]4 \pi [/tex]
