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According to the condition AB||CD, it means, m∠1=m∠3=m∠5=m∠7. Using this, m∠5=110°
The measure of angle 5 is .
It is given that the AB || CD and the measure of angle 1 is .
If a transversal line intersect two parallel line then all the corresponding angles are equal.
In the given figure the line AB || CD and one line is intersect them which is transversal line.
According to the property of transversal line,
Therefore the measure of angle 5 is .
part a: 1.08
part b: 27.59