Chord+Lengths+and+Related+Theorems+Gabi+L,+Kelly+L,+Holli+H,+Madi+S

http://www.mathopenref.com/chordsintersecting.html This website has a really in depth analysis of the intersecting chords theorem with a lot of pictures. It also has a lot of other vocabulary that is useful.

http://library.thinkquest.org/20991/geo/circles.html

This website is helpful because it has a lot of links for circle theorems and chord lengths. It also explains chords and radii in depth with pictures.

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This website is helpful because it gives you the theorems of the chords and segments in the circle. It also provides pictures and examples to go along with the theorems.

http://teacherweb.ftl.pinecrest.edu/wingjoa/My%20Webs/Geometry/c10.htm#10.2%20%20%20Other%20Chord%20Theorems

This website is by a geometry teacher and it has everything about chords and the theorems to go along with it.