Question

Construct two chords BC and DE that intersect in the interior of a circle at point F

Answer 1

The diagram has been inserted below.

There is a circle.

Two chords, BC and DE intersect at a point F inside the circle.

A chord of a circle is a straight line segment whose endpoints both lie on the circle.

To know the chord length,  we need to know the radius or central angle or the perpendicular distance to the center.