Intersecting Chords

 The Problem:

 In a circle (Iím not going to tell you how big it is), two chords, AB and CD, intersect at X.

AB is of length 7 cm, and the point X divides it so that AX = 3 cm. 

If I tell you that CX = 2, can you find the length of the whole chord CD?

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Last modified: June 18, 2007