Calculate X: Corresponding Angles with Parallel Lines and 20° Measurement

Question

The angles below are formed between two parallel lines.

Calculate the value of X.

00:00 Find X

00:05 Parallel lines according to the given data

00:15 Alternate angles are equal between parallel lines

00:20 Isolate X

00:30 And this is the solution to the question

Since the angle equal to 20 and the angle 2x are alternate angles, they are equal to each other.

Therefore:

$2x=20$

We divide both sections by 2:

$\frac{2x}{2}=\frac{20}{2}$

$x=10$

$10$