GEOMETRY

3. A polygon with four sides and four angles.
6. segment A part of a line that includes two points called endpoints and all the points between them.
7. A polygon with three sides and three angles.
10. An angle that forms a square corner and has a measure of 90 degrees.
12. Lines that cross each other at exactly one point.
14. Lines in the same plane that never intersect and are always the same distance apart.
17. A part of a line; it has one endpoint and continues without end in one direction.
18. An angle that measures greater than 90 degrees and less than 180 degrees.
19. A parallelogram with four equal, or congruent, sides and four right angles.
20. Having the EXACT same size and shape.

1. A parallelogram with opposite sides that are equal, or congruent, and with four right angles.
2. A quadrilateral whose opposite sides are parallel and equal, or congruent.
4. The number of square units needed to cover a surface.
5. Two lines that intersect to form four right angles.
8. An angle that measures greater than 0 degrees and less than 90 degrees.
9. An exact location in space.
11. A straight path of points in a plane that continues without end in both directions with NO endpoints.
13. An angle whose measure is 180 degrees.
15. A quadrilateral with exactly one pair of parallel sides.
16. A parallelogram with four equal, or congruent, sides.