This video introduces the theorems and their corollaries so that you'll be able to review them quickly before we get more into the gristle of them in the next couple videos. Also known as the Base Angle Theorem, in total these theorems also cover equilateral and equiangular triangles.

Isosceles & Equilateral Triangle Problems

This video covers how to do non-proof problems involving the Isosceles Triangle Theorem, its converse and corollaries, as well as the rules around equilateral and equiangular triangles.

Isosceles Triangle Theorem Proofs

Full proofs for the Isosceles Triangle Theorem, its converse the Base Angle Theorem, and the corollaries.

OOPS! To create playlists you must logged in.

If you do not have an account, you should get one, because it is awesome! You can save a playlist for each test or each chapter, and save your "greatest hits" into a "watch right before the final" list (not that we recommend cramming, but when in Rome...)