Solution :-
Here we can see that ∠b is vertically opposite to 68° angle and we know that vertically opposite angles are equal.
So , the measure of ∠ b will also be equal to 68° .
More to know :
- Alternate Interior angles are equal.
- Corresponding angles are equal.
- Sum of co - interior angles is 180° .
- Alternate exterior angles are equal.
- Measure of angle of straight line is 180°.
- Vertically opposite angles are equal.
