On this website http://www.albany.edu/~bd445/Eco_466Y/Slides/Infinite_Geometric_Sum,_Proof_Without_Words.pdf [Broken] there is a "proof without words" of the sum of the infinite geometric series. However, I don't understand what makes the proof valid. In what order were the constructions done etc.? What were the arguments of the proof?(adsbygoogle = window.adsbygoogle || []).push({});

I am referring to the very first picture with the similar triangles.

BiP

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# Proof without words: Geometric series

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