Here is the new description with all the links and additional text removed: Learn how to solve equations using the angles sum ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

The Pythagorean Theorem—discovered by the Greek mathematician Pythagoras in the 6th century BCE—is a cornerstone of mathematics. Simply stated as a 2 + b 2 = c 2, the theorem posits that the sum of ...

MathML is a standardized mark-up language that allows authors to provide unambiguous representations of mathematical expressions. MathML can be written by hand using a simple text editor or a special ...