The length of the shorter of the two chords shown is 13 units, the correct option is A.
What is a Circle?
A circle is a round shaped figure whose all points lie in one plane and the distance between the center of the circle and all the points on the circle is constant.
The line QS and TR are both chords of the circle
When two chords intersect inside a circle, then the product of the measures of the chords are equal,
9 * 4x = 12 * (x+2)
36x = 12x +24
24x = 24
x = 1
The measure of the two chords are 13 and 15 units.
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