Geomotry

1. a six-sided polygon with all sides of equal length and all angles of equal measure
3. a quadrilateral with two parallel sides, two sides of equal length, and one pair of base angles with equal measure
6. a triangle with all sides of equal length
7. the number of square units needed to fill up a region on a flat surface
8. a triangle with two sides of equal length
11. a quadrilateral with two pairs of consecutive, equal sides
12. a triangle with 90 degree angle and two sides of equal lengths
14. a quadrilateral with two pairs of parallel sides
16. the distance around a 2-dimensional object's exterior
18. a polygon with four sides

1. a quadrilateral with all sides of equal lengths
2. a five-sided polygon with all sides of equal length and all angles of equal measure
4. a triangle with 90 degree angle and all sides of different lengths
5. a quadrilateral with four right angles
9. a triangle with no sides of equal length
10. the amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.
13. the set points equidistant from a central point
15. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.
17. a quadrilateral with four right angles and four sides of equal lengths
19. a quadrilateral with one pair of parallel sides