This document discusses different types of angles formed by intersecting lines, including vertical angles which are congruent, angles adding up to 180 degrees when lines intersect, right angles measuring 90 degrees, and complementary angles adding up to 90 degrees. It also defines obtuse angles as greater than 90 degrees and a straight angle measuring 180 degrees.

1. Two NON-adjacent angles, formed by two intersecting lines, all vertical angles are congruent.

2. Two Lines that intersect adding up to 180 degrees…

3. Angles with a 90 degree measure

4. An ray splitting the original angle in half, creating two equal angles

5. Angles that add up to 180 degrees

7. Angles with a measure LESS than 90 degrees

8. OBTUSE: Angle GREATER than 90 degrees

9. OBTUSE: Angle GREATER than 90 degrees

10. Angle that measures180 degrees