I haven't had math in school for about 3 years, and I suck at it.
I have 3 circles, each with 100mm diameter, which makes the radius 50mm. I want the area of those 3 circles together.
I did
50mm * 50mm * Pi = 7854mm^2
7854mm^2 * 3 = 23562mm^2
Then I tried doing
50mm * 3 = 150mm
150mm * 150mm * Pi = 70685mm^2
Which one is it? I think it's the first one, but why is the second one so different?