Answer:
1. triangular
2. triangles
3. rectangles
4. rectangular
5. rectangles
6. number of faces = 6
number of edges = 12
number of vertices = 8
7. number of faces = 5
number of edges = 9
number of vertices = 6
8. number of faces = 7
number of edges = 15
number of vertices = 10
9. triangular
10. triangles
11. square
12. square
13. triangles
14. number of faces = 6
number of edges = 10
15. number of faces = 7
number of vertices = 7
16. cube
17. square pyramid
18. triangular pyramid
19. triangular prism
20. rectangular prism
