Identify the following

1. is a point that bisects a segment.
2. are two angles with a common vertex
3. these angles add up to 90deg.
4. is the total measure of the angles in a triangle.
5. an angle that forms a linear pair with one of the triangle's interior angles.

1. Segment's midpoint.
2. Adjacent angles.
3. Complementary angles.
4. 180deg
5. Exterior angle of a triangle.