Geometry

9. Two angles whose sum is 180 degrees
12. A point that divides a segment into two congruent segments
13. a line that intersects two or more coplanar lines at different points
14. lines in the same plane that never intersect
15. If P is in the interior of <RST, then m<RSP + m<PST = m<RST
16. A pair of opposite congruent angles formed by intersecting lines
17. The sum of the measures of the interior angles of a triangle is 180 degrees
18. 1. A long thin mark on a surface. 2. A continuous extent of length, straight or curved, without breadth or thickness; the trace of a moving point. 3. Long, narrow mark or band.
19. two interior angles on the same side of the transversal
20. Angles that lie outside a pair of lines and on opposite sides of a transversal.

1. A pair of adjacent angles whose noncommon sides are opposite rays.
2. Points that lie on the same line
3. Having the same size and shape
4. If B is between A and C, then AB + BC = AC
5. A part of a line with two endpoints
6. a ray that divides an angle into two congruent angles
7. angles between 2 lines and on opposite sides of a transversal
8. A triangle that contains only angles that are less than 90 degrees.
10. Angles formed by a transversal cutting through 2 or more lines that are in the same relative position.
11. a segment, ray, line, or plane that intersects a segment at its midpoint