Question

Which is a correct two-column proof?
Given: angle H and angle X are supplementary
Prove:L is parallel to N

Answer 1

or d. none of the above

Answer 2

@hartnn

Answer 3

@sourwing

Answer 4

So, we can discount one choice instantly. Statement 1 jumps all over the place, and doesn't make sense at all. Between the second and third choices, we can note that both take the same route, and the only difference is the rule used to make that step (we also note that the approach actually does prove that the two lines are parallel).

Which one has the correct name for that step?

Answer 5

c ?

Answer 6

Was going to type it, but it's kind of hard to put into words. But you should look up what the "same side interior angles" theorem says.

Answer 7

so it's b ?

Answer 8

@iPwnBunnies @iceicebaby