Question

In figure if ab is parallel to CD then the value of x is?​

Answer 1

Answer:

Also, 1 and x are the two

corresponding angles.

Then, according to the

Corresponding Angles Axiom,

which states:

If a transversal intersects two

parallel lines, then each pair of

corresponding angles are equal.

Therefore,

$21 = x$

Also, 1 and (120° +x) form a

linear pair, therefore, their sum must

be supplementary.

Therefore

$∠1 + </p><p></p><p>(120° +x) =180°$

$= x+120° +x180° \\ = 2x+120° 180° \\ = 2x 180° 120° \\ x \ \frac{60degree}{3} \\ x = 30degree$