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Two circles are externally tangent. Lines PAB and PA’B’ are common tangents with A and A’ on the smaller circle B and B’ on the larger circle. If PA = AB = 4, then the area of the smaller circle is

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Two circles are externally tangent. Lines PAB and PA’B’ are common tangents with A and A’ on the smaller circle B and B’ on the larger circle. If PA = AB = 4, then the area of the smaller circle is





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