It’s the end of the year so it’s time for the year-end summary of Proofs from the Book. Below are the most popular posts in terms of number of shares. Most Shared Post An Intuitive Proof to The Infinitude of Primes The Triangle Angle Sum Theorem What are mathematical proofs, really? The Sum of the […]

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# Yearly Archives: 2012

## The Proof of the Midpoint Formula

Introduction The midpoint is the middle point of a segment. It is equidistant from both end points. The midpoint formula is used to determine the coordinates of the midpoint of a segment. This formula is familiar to middle school and high school students, however most books do not discuss its proof. In this post, we […]

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## A Mathematical Proof that Two Equals One

Introduction Since it’s Christmas let us break a leg for a while from learning and thinking about serious mathematical proofs. In this post, I am going to prove something fun — something that is counterintuitive. If you love challenge, think about the proof and justify why it is right or wrong. In this post, I […]

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