Question

what is fg? chord diameter radius

Explanation:

Step1: Recall definitions

A chord is a line - segment that connects two points on the circumference of a circle. A diameter is a special chord that passes through the center of the circle. A radius is a line - segment from the center of the circle to a point on the circumference. Since we don't know if $\overline{FG}$ passes through the center, it is a chord.

Answer:

chord