Geometry Vocabulary

2. Three interior angles of a triangle are 180 degrees.
7. Lines in a plane that do not intersect.
9. Two adjacent angles that form a straight line.
10. Two angles who lie on the same side of the transversal, in the same relative position.
11. A line that intersects two or more lines.
14. A pair of nonadjacent angles on the same side of the transversal, located between two parallel lines.
15. A point where two lines meet.
16. Two angles that have a common vertex and share a side, but do not overlap.
17. An angle whose measure is less than 90 degrees.
19. A pair of nonadjacent angles on opposite sides of the transversal, located outside the two parallel lines.
20. Two angles whose sum is 180 degrees.

1. The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles.
3. A pair of nonadjacent angles on opposite sides of the transversal, located between two parallel lines.
4. An angle whose measure is greater than 90 but less than 180 degrees.
5. Two angles whose sum is 90 degrees.
6. An angle whose measure is 180 degrees.
8. Two angles who lie on the same side of the transversal, between two parallel lines.
12. A pair of opposite, nonadjacent angles formed by two intersecting lines.
13. Two lines that intersect at right angles.
18. An angle whose measure is 90 degrees.