i think he/she is talking about 2 circles. one inside of another. or maybe they are overlapping. I think he/she is confused about getting the area of the shaded or unshaded cirlce. Am i close?
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"Love is like a friendship caught on fire. In the beginning a flame, very pretty, often hot and fierce, but still only light and flickering. As love grows older, our hearts mature and our love becomes as coals, deep-burning and unquenchable. " - Bruce Lee
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