Three Dimensions Answers

1.

Object name
Cube
Triangular pyramid (tetrahedron)
Cone
Number of edges
12
6
1
Number of vertices
8
4
1
Number of faces
6
4
2 
(called the base and the curved surface)

2.

a. Cuboid b. Triangular prism

c. Tetrahedron

3.

 
top view
side view
front view
a.
b.
c.

 

4.a.

4.b.

4.c.

5. a. 

5.b. 

5.c.