Inscribed Angles: Solve Geometry Problems Easily

[libbon]

Ive been out of school cause i was sick and am in geometry and got some of my work, its on inscribed angles in circles and since i missed the lecture i have no idea how to do it, I am not asking anyone to explain it to me cause i probly won't understand in words, but if anyone knows any videos or any internet pages that explains this well. Its on " Inscribed Angles" The problems will have a circle with a inscribed triangle or quadrilateral or polygon and will ask to find some angles. And some will have two chords in the circle with a common end point and the other two endpoints making an intercepted arc. I tryed my best to explain it its just that i can't find anything on the web to explain it well.
Thanks

 

[HallsofIvy]

I googled on "Angles inscribed in a circle" and got a number of hits. Of particular interest are:
http://www.geom.uiuc.edu/~dwiggins/conj44.html
http://regentsprep.org/regents/mathb/5A1/CircleAngles.htm
http://www.mathwarehouse.com/geometry/circle/inscribed-angle.html