Youtube videos by Julie Harland are organized at http://YourMathGal.com. The set of videos on Equations of circles cover how to write, recognize and use the equation of a circle in both standard form, and general form. Knowledge of square roots, the distance formula, and completing the square is expected in some problems. Covers center of the circle, radius, graphing circles, writing equations. Several types of problems and examples are done in the set of videos. Part 1 covers circles centered at the origin.
eqncircle1.mp4<br />For more great math videos visit: www.youtube.com/user/videosbyjulieharland/videos