This is the question: "Three circles with their centers on line segment PQ are tangent at points P, R, and Q, where point R lies on line segment PQ." Which is greater sum of two smaller circles circumferences or the larger circle circumference?

Your video explanation and ETS explain that the answer is C, assuming that line PQ is equivalent to the diameter, but I don't understand how that assumption can be made, which is why I chose D. Please explain what I overlooked. Thank you!

## 1 Explanation