Question

Lines a and b are parallel lines cut by transversal f.

If mZ1 = 110°, what is mZ4?

20°

O

70°

110°

130°

Answer 1

(B) 70°

Explanation:

Answer 2

The measure of ∠4 = 70°.

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°.

`\angle1+\angle4=180 \°\\110 \°+\angle4=180 \°\\\angle4=180 \°-110 \°\\\angle4=70 \°`

Thus the measure of ∠4 = 70°.