In order to find the angle 1 in degrees we will use the concept of parallel and transversal line.
Now, we have been given that line p is parallel to the line BC and AB is transversal line.
Now angle ABC and angle 1 are alternate interior angles and they are equal.
Hence, we have
![\angle 1 = \angle ABC\\ \angle 1 =73^(\circ)](https://img.qammunity.org/2019/formulas/mathematics/high-school/3gz0kcl81yujh5sgf1c961lgjknl9qx8s8.png)
The measure of angle 1 is 73 degrees.