# Pi - area

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• April 30th 2010, 12:08 PM
molly
Pi - area
This is a maths problem that i will need to help me with my revision for my exams next week so please could you answer this problem:
The radius of a circle is 12mm. what is the area of the circle to the nearest mm squared.
• April 30th 2010, 12:20 PM
shenanigans87
Quote:

Originally Posted by molly
This is a maths problem that i will need to help me with my revision for my exams next week so please could you answer this problem:
The radius of a circle is 12mm. what is the area of the circle to the nearest mm squared.

The formula you need to remember is the area of a circle.

$A=\pi*r^2$

Where A = area
$\pi$= 3.14159
r = radius

Spoiler:

$A=\pi*r^2=\pi*12^2=\pi*144=452.389=452mm^2$