1. There is a flagpole in the school parking lot. Which of the following is true about the angle of depression from the top of the flagpole to the parking lot, and the angle of elevation from the parking lot to the top of the flagpole? Choose two of the following.
They are congruent
They are complementary
They are supplementary
They are corresponding angles
They are alternate exterior angles
They are alternate interior angles
They are same-side interior angles