Question 704030
Given: line segment MO is the perpendicular bisector of line segment LN.i.e. LO=NO
Prove: line segment MO bisects angle LMN 
proof:in triangles LOM & NOM
<LOM=<MON=90 deg
LO=NO
&MO is common 
so triangles LOM & NOM are congruent
so <LMO=<NMO
so line segment MO bisects angle LMN