GEOMETRY

4. A parallelogram with four equal, or congruent, sides.
7. A quadrilateral whose opposite sides are parallel and equal, or congruent.
8. A parallelogram with opposite sides that are equal, or congruent, and with four right angles.
10. Lines in the same plane that never intersect and are always the same distance apart.
11. segment A part of a line that includes two points called endpoints and all the points between them.
12. A part of a line; it has one endpoint and continues without end in one direction.
14. Having the EXACT same size and shape.
17. Lines that cross each other at exactly one point.
19. A parallelogram with four equal, or congruent, sides and four right angles.
20. An angle that measures greater than 0 degrees and less than 90 degrees.

1. A polygon with four sides and four angles.
2. A quadrilateral with exactly one pair of parallel sides.
3. The number of square units needed to cover a surface.
5. An angle whose measure is 180 degrees.
6. Two lines that intersect to form four right angles.
9. An angle that forms a square corner and has a measure of 90 degrees.
13. A straight path of points in a plane that continues without end in both directions with NO endpoints.
15. A polygon with three sides and three angles.
16. An exact location in space.
18. An angle that measures greater than 90 degrees and less than 180 degrees.