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Q: What does r2 accomplish that r does not?
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What is r squared plus r squared?

r2+r2 = 2r2


How do you find the radius of a circle if you have area?

The area of a circle is pi * r2 where r is the radius Solving for r, where A is the area: A = pi * r2 A/pi = r2 r = sqrt(A/pi)


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If: r2 = 17 Then: r = the square root of 17


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