What are the measures of ∠1 and ∠2?

Answer 1

if angles 1 and 2 are two angles of a triangle

then

angle 1 = 180 -angle 2 -angle 3

angle 2 = 180 -angle 1 - angle 3

if angles 1 and 2 are supplementary

then

angle 1 = 180-angle 2

angle 2 = 180-angle 1

if angles 1 and 2 are complementary

then

angle 1 =90-angle 2

angle 2 = 90-angle 1