Question

Given: ∆ABC

Prove: All three angles of ∆ABC add up to 180°.

Which reason can be used to fill in the numbered blank space?

Alternate Exterior Angles Theorem

Same-Side Interior Angles

Corresponding Angles Postulate

Alternate Interior Angles Theorem

Answer 1

There so many wuestions like this but I can't for the life of me remeber what theorem that would be..

Answer 2

Alternate Exterior Angles Theorem?

Answer 3

that one does sound right...

Answer 4

thanks yo

Answer 5

yeah cuz BAC is an interior angle..

Answer 6

thanks