Which relationship describes angles 1 and 2?
Select each correct answer.
A: adjacent angles
B: vertical angles
C: supplementary angles
D: complementary angles

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .