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Midpoint of a Line Segment
A line segment on the coordinate plane is defined by two endpoints whose coordinates are known. The midpoint of
this line is exactly halfway between these endpoints and its location can be found using the Midpoint Theorem,
which states:
• The x‐coordinate of the midpoint is the average of the x‐coordinates of the two endpoints.
• Likewise, the y‐coordinate is the average of the y‐coordinates of the endpoints.
Coordinates of the midpoint of the line segment AB, ( and )
are
and
‐ 84 ‐
GMAT Club Math Book
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