Question

Find the values of x and y for which the lines are parallel.

https://dlap.gradpoint.com/Resz/~0.KkSyxOmiyS4KwuFB.RwHYVs75PLDGN3WDowMJmHla-vSvq1kr5VFA1dmyd4g/11335527,A01,111,0,0,0,0/Assets/testitemimages/geometry_a/parallel_and_perpendicular_lines/mc022-1.jpg

x = 78, y = 55

x = 40, y = 53

x = 53, y = 78

x = 78, y = 53

Answer 1

Since the lines are parallel you can assume that 77° = (x-1)°

Answer 2

Once you know that, you can add up the inner sides and set it to 180