Calculate α and β Angles in Intersecting Lines with 50° Angle

Question

Calculate the size of the angles. $\alpha,\beta$

00:00 Find angles A, B

00:04 Lines are parallel according to the given data

00:09 Corresponding angles between parallel lines are equal

00:19 Supplementary angle to a straight angle

00:24 Let's isolate angle A

00:29 This is angle A

00:34 Vertical angles are equal

00:39 And this is the solution to the question

$\alpha=130$ $\beta=50$