Question 641259
A chord is 20 cm long and is 6 cm from the center.
How long is the chord that is 4 cm from the center of the circle?
:
If you draw this out you can see the radius Squared will be the hypotenuse of
 half the chord(10cm), and 6 cm
r^2 = 10^2 + 6^2
r^2 = 136
:
"How long is the chord that is 4 cm from the center of the circle?"
this chord = {{{2*sqrt(136-4^2)}}} = 21.91 cm