by Baltuilhe » Mon Feb 04, 2019 12:39 pm
Good afternoon!!
If Radius of the circle R, Chord measure is C and distance from the center of the circle to the chord is D:
[tex]R^2=\left(\dfrac{C}{2}\right)^2+D^2\\\\\boxed{R=\sqrt{\left(\dfrac{C}{2}\right)^2+D^2}}[/tex]
Knowing R, you have the diameter.
I hope I have helped!