Answer:
The measure of ∠4 = 70°.
Step-by-step explanation:
Given;
a║b and f is the transversal line.
And also ∠1 = 110°.
Solution,
∵ a and b are parallel lines and f is the transversal line.
∴ ∠1 and ∠4 makes a straight angle.
And we know that the measure of a straight angle is 180°.
[tex]\angle1+\angle4=180 \°\\110 \°+\angle4=180 \°\\\angle4=180 \°-110 \°\\\angle4=70 \°[/tex]
Thus the measure of ∠4 = 70°.
