FInd the length of DB and CD. Please help!

How to determine whether two known pairs of points are on the same line.

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).