Find the relationship between ∠1 and ∠3.

m∠1 = 85°

∠1 and ∠2 are supplementary, so I know that 180° - 85° = ∠2.

∠2 and ∠3 are supplementary, so I know that 180° - 95° = ∠3.

The measure of ∠1 is the same as the measure of ∠3.

180° − 85° = 95°

180° − 95° = 85°

85° = 85°

∠1 ≅ ∠3