Question 73426
Given: MI=LD
Prove:ML=ID
for reasons name the propety that makes the statement is true
Statements Reasons
MI=LD Given
IL=IL Reflexive
MI+IL=LD+IL I think addition
MI+IL=ML  I is the point connecting two line segments, MI and LI.
LD+IL=ID You are substituting LD for MI because MI=LD and L is the 
point connecting DL and IL
ML=ID I think substitution; that is correct.
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Cheers,
Stan H.