| A | B |
|---|
| Acute Angle | is less than 90 degrees |
| Straight Angle | is 180 degrees |
| Obtuse Angle | is greater than 90 degrees |
| Right Angle | is 90 degrees |
| Ray | is part of a line extending in one direction |
| Angle | two rays that have same end/beginning point |
| Vertex | where two rays meet to form an angle |
| Terminal Side | the side of the angle that ends |
| Initial Side | the side where the angle starts |
| Vertical Angles | a pair of angles which are opposite angles and are always congruent |
| Corresponding Angles | a pair of angles (angle, skip an angle, angle) which are congruent with parallel lines and a transversal |
| Alternate Interior Angles | a pair of angles on the inside of parallel lines with a transversal and are congruent |
| Alternate Exterior Angles | a pair of angles that are on the outsid of parallel lines with a transversal and are congruent |
| Congruent | same size, shape or measure |
| Tilda | the symbol that is above the equal sign meaning congruent |
