Respuesta :

The question asks us to complete the proof. To do this, we can simply read the statements and make our judgments from there. 
a) Given
b) Def. of a Midpoint
c) Vertical Angles
d) SAS (Side-Angle-Side)
Hope this helped!
a= Given
b=definition of midpoint
c=vertical angles are congruent
d=SAS postulate
:)
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