Answers:
a
[1] Vertical Angle Theorem[2] Converse of Same Side Interior Angle Theorem
b
[1] Vertical Angle Theorem [2] Same Side Interior Angle Theorem
c
[1] Vertical Angle Theorem [2] Converse of Same Side Exterior Angle Theorem
d
[1] Converse of Same Side Interior Angle Theorem[2] Vertical Angle Theorem
