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.