Match the statement to the property it shows.
if ab = cd, then cd = ab
transitive property
if mn = xy, and xy = ab, then mn = ab.
symmetric property
segment cd is congruent to segment cd.
reflexive property

Idon't get it either

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.