Maths Challenge
Maths challenge.net: Circular Pipes
A realistic world problem using the knowledge of chords and the parts of a circle to solve. Test your knowledge on this brain teaser!
Wolfram Research
Wolfram Math World: Chord
Describes what a chord is and shows a diagram and shows how to find areas using integral calculus.
CK-12 Foundation
Ck 12: Trigonometry: Length of a Chord
[Free Registration/Login may be required to access all resource tools.] Find the length of a chord of a circle.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Chord
Find a quick, concise explanation of a chord. Examples are illustrated and explained.