math help please*?

Question

1.Ab is parallel to cd, m
2.in triangle ABC, AC congruent to BC.The degree measure of an exterior angle at vertex C is represented by 5x+10.If m
3.AB intersects CD at E; m a.find x b.show that Ab is perpindicular to CD

Answer 1

1. Not enough information - no idea what x, y, and z are in relation to a, b, c, and d, or even to each other.

2. Since AC is congruent to BC, m
3. a) m 5x = 200 => x = 40°.
b) m