Question

I need help with this... I don't understand geometry at all lol.

Answer 1

1. vertical angle theorem and triangle angle sum theorem

2. The sum of the interior angles of a triangle = 180
    so < x = 180 - (70 + 30) = 180 - 100 = 80
    and < y is a vertical angle to < x...and vertical angles are equal..
    so < y = 80