Bruh no one is helping me with my questions anymore so could someone please help me on this :/ which of these statements are true

1. Vertical angles formed by intersecting lines are directly across from each other and are sometimes congruent.

2. An angle bisector divides an angle into two congruent angles

3. A midpoint divides a line into two congruent lines.

4. Perpendicular lines form congruent right angles.

5. An angle measuring 225 degrees is obtuse.

6. If two angles form a linear pair, then they are complementary.