# Thread: Can anyone work out the How Much the Red Color Area?

1. ## Can anyone work out the How Much the Red Color Area?

See this drawing:
Square side = 10,
how much is the red area?

2. ## Re: Can anyone work out the How Much the Red Color Area?

Originally Posted by universalwing
See this drawing:
Square side = 10,
how much is the red area?
The entire coloured area inside the square is $100$ square units.
The area inside the large complete circle is $(5)^2\pi$ square units
Can you explain why the brown area is $\frac{1}{4}\left(100-25\pi)\right)$ square units?