Answer:
75 degrees
Step-by-step explanation:
1. Find alternate interior angle to angle 5
straight angle theorem says straight lines are 180 degrees, so add angles two and three and subtract from 180 to get degrees of the alternate interior angle
180 - (60+45) = 75
2. Definition of alternate interior angles say that that angle and 5 are congruent, so 5 is 75 degrees
