Search "theorem"
Another Pythagorean theorem proof
Visually proving the Pythagorean Theorem
Khan Academy
Pythagorean theorem proofs
509
10:21
Pythagorean theorem proof using similarity
Proof of the Pythagorean Theorem using similarity
Khan Academy
Pythagorean theorem proofs
507
09:51
The Pythagorean theorem intro
Introduction to the Pythagorean Theorem
Khan Academy
The Pythagorean theorem
537
10:45
The fundamental theorem of arithmetic
Ben Eater and Sal walk through the "Fundamental theorem of arithmetic" module: http://www.khanacademy.org/math/arithmetic/factors-multiples/e/the_fundamental_theorem_of_arithmetic
Khan Academy
Prime factorization
493
04:32
SSS to show a radius is perpendicular to a chord that it bisects
More on the difference between a theorem and axiom. Proving a cool result using SSS
Khan Academy
Congruence postulates
633
08:18
Other triangle congruence postulates
SSS, SAS, ASA and AAS postulates for congruent triangles. Showing AAA is only good for similarity and SSA is good for neither
Khan Academy
Congruence postulates
569
13:27
