I first started teaching Geometry last year and have taken over "Informal Geometry" this year. As the name of the second class implies, the idea of formal proof is strongly de-emphasized; this class ...

A team led by mathematician Thomas Hales has delivered a formal proof of the Kepler Conjecture, which is the definitive resolution of a problem that had gone unsolved for more than 300 years. The ...

Let's explore how the Pythagorean theorem was known and applied in India centuries before Pythagoras, highlighting a poetic geometry problem from Bhāskara II’s Līlāvatī. It traces the theorem’s ...