Answer:
A)Corresponding angles (When two lines are crossed by another line (which is called the Transversal), the angles in matching corners are called corresponding angles
B)They are congruent to each other
C) 4+10x=11x-1
4=x-1
5=x
( we put them equal to each other because they are the same)
D)4+10(5)=
4+50=54
D)11(5)-1=
55-1=54