Answer with Step-by-step explanation:
We are given that
Line s is parallel to line t.
To prove that : angle 3 and angle 5 are supplementary.
1.
Reason: Given
2.Angle 1 and angle 3 are supplementary
Reason: Exterior sides in opposite rays
3.
Reason: By definition of supplementary
4.
Reason: If lines are parallel , then corresponding angles are equal.
5.
Reason: Substitution
Hence, proved.