Circles
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Intro to Central Angles and Arcs
http://www.youtube.com/watch?v=Tf0gkV1kIls
Continutation of above...
http://www.youtube.com/watch?v=6KE4G7XpQPQ
Continued again....
http://www.youtube.com/watch?v=0t7wiZoJHLU
Central Angles Related to Chords
http://www.youtube.com/watch?v=o5cq9BA_hlE
*** Intro to Circles and Central Angles, Finding x using Arc Measure
http://www.youtube.com/watch?v=aE1Iw67awmk
** Central Angles, Arcs, Chords
http://www.youtube.com/watch?v=xI2BZ5R_PrM
** Practice Finding Arcs in a Circle
http://www.youtube.com/watch?v=8A963sOXimc
*Tangents Perpendicular to Circles
http://www.youtube.com/watch?v=mGsUwGiEKY8
* Tangents to a circle
http://www.youtube.com/watch?v=it6yi7suSIQ
Angles in Semicircles and Angles formed by Chords to Tangents
http://www.youtube.com/watch?v=0FlvlI3jLVM
Completing the Square
https://www.youtube.com/watch?v=-r6pJk2nM8M
Translating and Dilating the Equation of a Circle