Question

Which of the following arguments correctly justifies the second step of the flow proof of the triangle angle sum theorem below?

Answer 1

@triciaal

Answer 2

A.

Linear pair postulate


B.

Vertical angles theorem


C.

Alternate exterior angles theorem


D.

Alternate interior angles theorem

Answer 3

@triciaal is it A.?

Answer 4

where is the diagram?

Answer 5

you reposted the question where is the diagram with the angles and the lines L and m?

Answer 6

that's all it gave me

Answer 7

what you have been working on would justify A
review the question with the drawing where I showed 2 + 3 + 4 = 180
1 = 5
<4 = 180 - <5
and <4 = 180 - (<2 + <3)