# Area Between Two Concentric Circles

I have a word problem that requires me to find the area of the ring and the area of the circle where the area between each concentric circle is r which is the same as the smallest circles radius. How can I find the radius and compare them to each other? Would I use the standard formula of a circle?

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Radius if the smallest circle = r

Let the thickness of the ring be t.

Then outer radius of the ring = r + t

Inner radius of ...

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