Match each one 1. decagon
a polygon with five sides
2. diagonal
an interior line that connects two vertices that are not already connected
3. dodecagon
a polygon with ten sides
4. equiangular
a polygon with twelve sides
5. equilateral
a polygon with eight sides
6. equilateral triangle
a polygon with six sides
7. heptagon
a closed figure made up of line segments
8. hexagon
having sides of equal length
9. interior angles
a triangle whose sides all are the same length
10. octagon
a polygon with seven sides
11. pentagon
a polygon whose sides are all the same length and whose angles are all the same measure
12. polygon
a polygon with four sides
13. quadrilateral
having equal angles
14. regular polygon
inside angles