A line segment is regarded as a portion of a line that has two endpoints. The length of line segment MN is 18 units.
What are line segments?
A line is known to be kind of uni-dimensional shape that is said to range from both directions that is said to never ends. A line segment is said to be a portion of the line and it is said to be the smallest distance between the two points that are said to be measured.
Note that if 2 chords intersect in a circle, what is gotten of their segments are said to be equal.
Therefore 9 * (x +1) = 15 * (x -1)
9x +9 = 15x -15
24 = 6x
x = 4
Therefore:
Line AD = 9 + x + 1
Line AD = 14
Line MN = 15 + x -1
Line MN = 18
So the correct option is 18 units.
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