Useful Vocbulary and Key.
Description: Angles Formed By a Transversal Figure
Image copyright: My Own Creation, 2009, Made in Paint
1. Transversal A line that crosses two or more lines.
2. Angle the amount of space between two lines meeting at the same point.
3. Parallel lines that are the same distance apart and arent crossing.
4. Perpendicular lines that cross at right angles to each other.
5. Adjacent angle angles that are immediately next to each other.
6. Alternate exterior angle 2 parallel lines intersected by a transversal on the outside of the parallel lines.
7. Alternate interior angle 2 parallel lines intersected by a transversal in between the parallel lines.
8. Vertical angle 2 angles that are opposite each other.
9. acute angle An angle that is less than 90°
10. right angle An angle that is exactly 90°
11. obtuse angle An angle that is more than 90°
Key:
1. Parallel lines: Line Segments AB & CD.
2. transversal line: Line Segment EF
3. Adjacent angle (8): 1 & 2, 2 & 3, 3 & 4, 4 & 1, 5 & 6, 6 & 7, 7 & 8, 8 & 5.
4. Alternate exterior angle: 1 & 7, 3 & 5.
5. Alternate interior angle: 2 & 6, 4 & 8.
6. Vertical angles: 1 & 3, 2 & 4, 5 & 7, 6 & 8.
7. Acute angles: 2,4,6,8.
8. Obtuse angles: 1,3,5,7.
9. Right angles: None.
