.
Given: ∠1 and ∠2 are supplementary.
Prove: ℓ ∥ m

What is the missing piece of information in the paragraph proof?

Proof: It is given that ∠1 and ∠2 are supplementary. ∠1 and ∠3 are also supplementary, so ∠2 ≅ ∠3. Since _____ are corresponding angles, ℓ ∥ m.




∠2 and ∠3


∠2 and ∠1


∠1 and ∠3


∠1 and ∠2