10+ points!
which statements about the angles of the triangle are true? check all that apply.

-angle 1 is an exterior angle.
-angle 2 is an exterior angle.
-angle 4 is an exterior angle.
-angle 7 is an adjacent interior angle.
-angle 6 is an adjacent interior angle. it is adjacent to the exterior angle 4.
-angles 6 and 8 are remote interior angles to the exterior angle 1.
-angles 6 and 7 are remote interior angles to the exterior angle 2.
-angles 7 and 8 are remote interior angles to the exterior angle 4.