Respuesta :

W0lf93
The sum of angles CAD and DAB is 180 degrees. This is because they are all on a straight line (because points CAB are colinear) and angles on a straight line add up to 180 degrees.
natalieartiga904

Answer:

The sum is CB.

Step-by-step explanation:

This is because of points C, A, and B are all collinear, which means that they all fall on the same line. Since the points are collinear, the sum of CA and AB is the whole line, which is CB.  I really hope this helps :)