19. What is a valid conclusion for the given hypothesis: if line OM bisects angle LON, then _________?
a. LOM= NOM
b. LON=NOM
c. LOM= NOL
d. MON= NOL
20. What is the measurement of line segment AB if the segment PB=30 with midpoint A?
a. 15
b. 30
c. 45
d. 60