Question 1153751
The radius CD is perpendicular to chord AB, so it bisects the chord.<br>
Draw the radius CA; that forms right triangle CEA in which the lengths of the hypotenuse and one leg are known.  Use the Pythagorean Theorem to find the length of the other leg.<br>
That other leg is half the length of the chord, so double the length of that leg to find the length of the chord.<br>