1 Answer

Brionius · Answer 1 · 2018-07-24T03:22:32+0000

Equal to the area. Area of circle is

$\pi r^2$
This equals to
$4 \pi$ due to 2^2.
Circumference is
$2 \pi r$
This equals to
$2 \pi (2)$
When you multiply the 2 and the radius together, they equal to 2^2.
Which results to
$4 \pi$

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