Question

https://hta8405-hta-pps.gradpoint.com/Resource/4625414,8B5,0,0,0,0,0,12/Assets/testitemimages/geometry_a/parallel_and_perpendicular_lines/mc037-1.jpg
It is given that <1 and <2 are supplementary.
<1 and <3 are also supplementary , so <2=<3 since _____ are corresponding angles, a || b.

Answer 1

ok... so 1 and 2 are supplementary and they are also cointerior angles

so a and b are parallel since the cointerior angles add to 180

Answer 2

oops... forgot.. sum to 180 in parallel lines

Answer 3

Thank you :)