Question

Ok, I'm having trouble writing a proof for corresponding angles Theorem.

Answer 1

I know that it's widely known as a axiom/postulate, but it's a theorem in my lesson and I need help with creating a theorem for it.

Answer 2

As in statements with reasons next to them.

Answer 3

What exactly do you need, should I demonstrate how to prove the corresponding angles using my own example?

Answer 4

That would be a good basis for mine, yes.

Answer 5

More specifically, corresponding angles in transversals.

Answer 6

You're trying to prove that A = B, right?

Answer 7

Yes, a transversal.

Answer 8

make your reason and statement chart....

Answer 9

You know that A + C = 180 because of some rule I forgot.

Answer 10

Supplementary angles.

Answer 11

Sorry, Solomon, do you want me to shut up so you can do yours

Answer 12

Would it be that simple to use just the supplementary and angle addition postulates?

Answer 13

That's what I was thinking, if you can get away with it. :P

Answer 14

Well I already completed the vertical angle theorem proof, and it was a bit long

Answer 15

I hope it is that simple

Answer 16

Is this geometry or College?

Answer 17

I've got another way if it won't work.

Answer 18

b/c for college it is in essay form, and in geometry it is in a chart form.

Answer 19

In geometry.
Chart form, not paragraph form.

Answer 20

Simply put, I'm trying to prove that two angles that correspond from different sides of the transversal are congruent.

Answer 21

As SACAPUNTAS drew, you have

Answer 22

I really don't know how to "prove" that they are equal, I now they 100% do though.

Answer 23

@SACAPUNTAS

Answer 24

Yes, A and C are corresponding angles

Answer 25

I don't either, that's why I posted here

Answer 26

It's a postulate because you really can't prove it without relying on other theorems that rely on it. If that's ok, though, we can do it.

Answer 27

Yes, the assignment says I may use other theorems to prove it.

Answer 28

Ok, so you know that A + C = 180 because they are supplementary angles. You also know that B + C = 180 because they are interior angles of parallel lines on the same side of a transversal.

Answer 29

Yes

Answer 30

If 180 - B = C and 180 - A = C then 180 - B = 180 - A so A = B

Answer 31

Ok, I see what you mean

Answer 32

And I can turn that into statement + reason form from that.
Thank you!