Prove that the bisectors of alternate interior angles are equal

Does anyone know how to do geometryme with this problem

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.