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The Brainliest Answer!

Assume tht it has two midpoints C and D.

so

AC=BC and AD=BD.

Since C is the midpoint A,C and B are collinear.

AC+BC=AB -(1) eq

AD+BD=AB -(2)eq

from (1) and (2) we get

AC+BC=AD+BD

2AC=2AD

ie AC=AD

This means C and D coincides.

Therefore every line segments have one and only one midpoint.