Mathematics

PEMDAS is a rule that ensures your math operations stay in perfect order.

You can generate Pythagorean triples using Euclid’s method.

Let’s look at a classic example of an algebraic proof

Proof using hexagons.

Behold!

Let us use corresponding and alternate interior angles.

Euclid's proof is deductive and geometrically creative!

A classic rearrangement proof attributed to Pythagoras.

Proof and historical attribution of vertically opposite angles.

Countable infinity refers to infinite sets whose elements can be listed in a sequence.

A classic thought experiment that explores infinity.

The empty set is its own only subset, as it contains no elements to include in any other set.

A brief overview of two common ways to write sets.

A unit square is a square with side length 1.