Our founder, Dr. Yan, has watched many online math videos. Most have errors and logical flaws. He decided to create videos that are logically correct. We hope you like them.
(-1)x(-1)=1 Video
0*(x)=0 Video
FOIL Method
Pythagorean Theorem
Sum of the angles in a triangle is 180 degrees
30-60--90 triangle rule with derivation
Proving the square root of 2 is irrational
Euclid's Classical Proof of the infinitude of prime numbers
Derivation of the geometric series formula
Triangles, Squares, and hexagons are the only regular polygons that tile tile the plane
Cantor's 1/3 set
Finding limits to recursively defined sequences
Compound Fractions made Easy
Simplifying Rational Expressions ( same as above )
A sample proof by induction
AMC 8 Exam prep
AMC 8 2019 Exam review