Geometry

The answer is D. 8.

 

1. Recall the Segment Addition Postulate:

The Segment Addition Postulate states that if a point is between two points and on a line segment, then the length of the line segment is equal to the sum of the lengths of the line segments and . That is, .

 

2. Substitute the given values into the formula:

We are given that and .

Substitute these values into the equation

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