Given: 

Transversal








Find: 

Exercise
To find:
The values of
Definition:
The angles that are formed on opposite sides of the transversal and inside the two lines are alternate interior angles.
If the lines are parallel, then the alternate interior angles are equal.
If there exists two parallel lines cut by a transversal then the pair of interior angles on the same side of transversal is supplementary.
The pair of nonadjacent angles in the opposite direction that lie on two intersecting straight lines is called vertical angles.
Given:
The given figure is,
The given angle is
Calculation:
Consider the given figure,
From the figure,
From the figure,
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