geometry

2. - half infinite line or half line with one of the 2 points and taken to be at infinity
4. -a measurement of a plane angle in which one full rotation is 360 degrees.
5. -a point in time halfway between the beginning and the end, as of a process, event, or situation
8. - lines that intersect at a right angle
12. - each angular point of a polygon, polyhedron, or other figure.
13. - lines in a plane that are the same distance apart.
14. - a straight one-dimensional figure having no thickness and extending infinitely in both directions.

1. - an angle whose sides lie in opposite directions from the vertex in the same straight line
3. - exact position or location on a plane surface.
6. - 90 degrees
7. - par of a line ha is bounded by 2 distinct end points, and contains every point on the line that is between its endpoints.
9. - to measure distances or draw straight lines.
10. - formed b 2 lines, line segments, or rays diverging from a vertex.
11. - a two-dimensional doubly ruled surface spanned by two linearly independent vectors.