Geometry Terms

2. a part of a line
4. a part of a line that has one endpoint and goes on infinitely in only one direction.
6. two angles that have a common side and a common vertex (corner point) but do not overlap in any way.
9. at an angle of 90° to a given line, plane, or surface.
12. a pair of adjacent angles formed when two lines intersect.
13. lines in a plane which do not meet
14. angle measures less than 90 degrees.
17. in the same plane.
18. an angle of 180°.
19. the arc length of a circle subtended by the lines and by the radius of that circle.
21. the start of something

1. a line or ray that divides an angle into two congruent angles.
2. two angles or arcs whose sum is 180 degrees.
3. an angle more than 90° and less than 180°.
4. an angle of 90.
5. points lying in the same straight line.
7. the point that is equal between the other points.
8. each angular point of a polygon, polyhedron, or other figure.
10. two angles that add up to 90 degrees.
11. an alignment in which the top is always above the bottom.
15. not lying or acting in the same straight line.
16. they have the same shape and size.
20. a straight one- dimensional figure that has no thickness and extends endlessly in both directions.