Find radian measure of a centralized angle

Jul 2015
705
25
United States
Circle radius is 1cm.

Area of certain sector is pi/5cm^2

What is the radian measure of the central angle.

Do I do C= 2pi(1)

then 2pi*5cm^2?
 

skeeter

MHF Helper
Jun 2008
16,217
6,765
North Texas
$A=\dfrac{r^2 \theta}{2}$

$\dfrac{\pi}{5}=\dfrac{\theta}{2}$

$\theta=\dfrac{2\pi}{5}$
 
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Jul 2015
705
25
United States
you're the man skeeter.
 

topsquark

Forum Staff
Jan 2006
11,602
3,458
Wellsville, NY
Actually he's more "the aedes canadensis."

-Dan