geometry
posted by jessica .
1)givenAB=CD,CD=EF
proveABEF (in 5 steps that show why it is corect; i.e twocolumn proof)
2)Given<2=<3, <4=<5
prove<1 is supplementay to <6
(in 3 steps, with the two column proof)
TWOCOLUMN PROOF LOOKS LIKE THIS....
STATEMENT: REASON:
1.AB=CD,CD=EF 1.Given
2.?? 2.??
3.?? 3.??
4.?? 4.??
5.AB=EF 5.??

Transitive Axiom If a = b and b = c then a = c
So it seems to me to be two steps, not five.
You second makes no sense, it does not indicate any relationship with <1 and any other angle. 
Purple because aliens dont wear hats