The remote interior angles of a triangle are basically the two angles that do not share a vertex with and are opposite to the exterior angle.
5. ∠1 and ∠2
6. ∠2 and ∠3
7. ∠1 and ∠3
Because the exterior angle of a triangle is equal to the remote interior angles we can set up the following equations:
8.

9.
First angle 90 degrees
Second angle 30 degrees
Third angle 60 degrees
I am pretty sure it's 44 degrees.
He wants to buy flowers for me lol