language of geometry

2. an angle whose sides lie in opposite directions from the vertex in the same straight line and which equals two right angles.
7. an angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
9. a vector from a point to a point
10. a straight one-dimensional figure having no thickness and extending infinitely in both directions.
11. a location represented by a dot.
12. lines two lines that share exactly one point.
13. each angular point of a polygon, polyhedron, or other figure.
16. lines that intersect at a right (90 degrees) angle.

1. a plane is a flat, two-dimensional surface that extends indefinitely.
3. figure formed by two rays
4. measurement of a plane angle in which one full rotation is 360 degrees.
5. a measuring instrument, typically made of transparent plastic or glass, for measuring angles.
6. straight lines that do not intersect at any point.
8. a point in time halfway between the beginning and the end, as of a process, event, or situation
14. to measure distances or draw straight lines.
15. part of a line that is bounded by two distinct end points, and contains every point on the line that is between its endpoints