Proof Without Words: The Area of an Inner Square

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Abstract:

What is the area of the (inner) square obtained by slicing the corners off a larger square? This visual proof avoids algebra by considering the area of a parallelogram.

Document Type: Research Article

DOI: http://dx.doi.org/10.4169/college.math.j.44.4.322

Publication date: September 1, 2013

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