Geometry Basics

2. A flat surface made up of points that extends indefinitely in all directions.
4. Two angles that share a common vertex and side.
8. Adjacent angles that are supplementary.
9. Two angles with measures that have a sum of 180 degrees.
12. A line, ray, or segment that divides an angle or segment into two equal parts.
13. Points that lie on the same plane.
14. Two angles with measures that have a sum of 90 degrees.
15. Congruent angles that are across from each other on intersecting lines.

1. Points that lie on the same plane.
3. The intersection of two rays at a common endpoint.
5. A measurable part of a line consisting of two endpoints.
6. Two lines that intersect at a 90 degree angle.
7. A line that extends indefinitely in one direction
10. A location with no size or shape.
11. Made up of points with no thickness or width; Extends indefinitely in both directions.