Circle Basics

Circle Vocab

This video covers the basis of the following vocab items: radius, diameter, circumference, chord, secant, tangent, arcs (major & minor), inscribed angles, Central angles, concentric circles.

Basic Circle Proofs

This video covers a couple of proofs that utilize the most basic aspects of circles, namely that all the radii of a circle are congruent. As usual, you'll also have to keep an eye out for theorems you already know from previous chapters, like triangles. It always comes back to triangles.

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...)

Start your trial!