1. Angles In Baseball By, Sean Gallagher

2. Right A right angle is exactly 90 degrees

3. Obtuse Angle An obtuse angle is greater than 90 degrees

4. Acute Angle An acute angle is less than 90 degrees

5. Opposite Rays They are two rays determined by choosing a point on a line, thus these rays share a common endpoint and are collinear

6. Bisector A bisector bisects a angle to split it into two equal halves

7. Linear Pair A pair of adjacent angles whose non-common sides are opposite rays. The angles measure to equal 18- degrees

8. Vertical Angles Two nonadjacent angles formed by two intersecting lines, all vertical angles are congruent

9. Complementary Angles Two angles that when added together equal 90 degrees

10. Supplementary Angles Two angles that when added together equal 180 degrees