Ch. 1 Geometry

4. Words that do not have formal definitions, but there is agreement about what they mean
7. Consists of two different rays with the same endpoint
9. Has no dimension. It is represented by a dot
11. A polygon with all congruent sides
12. Two adjacent angles in which their noncommon sides are opposite rays
13. No line that contains a side of the polygon contains a point in the interior of the polygon
17. Part of a line consisting of two endpoints and all points between them
18. Segments that have the same length
19. A rule/statement that can be proven
20. A polygon that is equilateral and equiangular
22. A closed plane figure that is formed by three or more line segments and each side intersects exactly two sides so that no two sides with a common endpoint are collinear
25. On the same plan
28. Two collinear rays with the same endpoint
29. A polygon with all congruent angles
30. Not convex
31. A point, ray, line, segment, or plane that intersects the segment at its midpoint
33. The point that divides the segment into two congruent segments

1. An angle whose measure is equal to 180 degrees
2. Two angles that share a common vertex and side, but have no common interior point
3. Two nonadjacent angles formed by two intersecting lines
5. How many directions space takes up
6. Angles whose sum is 180 degrees
7. An angle whose measure is less than 90 degrees
8. Angles whose sum is 90 degrees
10. On the same line
14. An angle whose measure is 90 degrees
15. Where two line segments meet
16. A ray that divides an angle into two congruent angles
21. Set of points the figures have in common
23. An angle whose measure is greater than 90 degrees and less than 180 degrees
24. Has one dimension. It is represented by a line with two arrowheads, but extends without end
26. Has two dimensions. It is represented by a shape that looks like a floor or a wall, but extends without end
27. A polygon with n sides
32. Part of a line consisting of one endpoint and all the points of the line on one side of the endpoint