Answer:
C
Explanation:
I. a // b because m∠2 is on a 180° line, which splits the line into two sections, both being 90°. If m∠1=m∠2, then m∠1 is also 90°. The lines a and b are parallel from each other.
II. since m∠1 is 90°, and for a line to be perpendicular to the other line, they would have to be at a 90°. So, a⊥c because they intersect each other at a 90° angle.