# Thread: Area of shaded region problem

1. ## Area of shaded region problem

Hey, I have a problem I'm not sure how to figure out, It's finding the area of the shaded region, I've attached a picture of the problem, thanks in advance!

2. Figure it up I say...

$\displaystyle (175+60)(144)-\frac{\pi 60^2}{4}-\frac{\pi 65^2}{2} + \frac{\pi 72^2}{2}$

3. so how did you figure out the (175+60)(144) part? i understand that the 175 comes from the top, but where does the 60 and 144 come from?

4. 60cm is the radius of circle in the corner, 144cm=2*72cm is the diameter of circle...

5. oooo okay i get it, thanks alot!