My favorite math theorem is Pythagorean Theorem becuase this theorem is one of the most famous theorems and used a lot of times in real life.
Pythagorean Theorem states that the square of the hypotenuse is same as the sum of the squares of two other sides in right triangle.
$ a^2 = b^2+c^2 $
- Euler's formula_MA453Fall2008walther is another favorite of mine, although it is technically not a theorem.
