Free Visualising Solid Shapes 03 Practice Test - 8th Grade

Question 1

A pyramid is a polyhedron whose base is a polygon and whose lateral faces are triangles with a common vertex.

True

False

SOLUTION

Solution : A

As you can see in the image above, a pyramid is a polyhedron whose base is a polygon and whose lateral faces are triangles with a common vertex.

Question 2

The number of vertices on a pyramid with square base is

___

SOLUTION

Solution :

As is clear from the picture, there are 5 vertices.

Question 3

Square prism is also known as__________.

Only Cube

Only Cuboid

Either Cuboid or Cube

Pyramid

SOLUTION

Solution : C

A square prism has square oppposite faces and either rectangular or square lateral faces. Hence, it is also known as either cuboid or cube.

Question 4

How many edges are there for a prism with hexagonal base?

SOLUTION

Solution : D

Here, the edges are AB, BC, CD, DE, EF, AF, AG, FL, EK, DJ, CI, BH, GH, HI, IJ, JK, KL and GL.

Hence, the number of edges are 18.

Question 5

Which of the following doesn't have any vertices or flat faces?

Cube

Prism

Sphere

Pyramid

SOLUTION

Solution : C

Sphere doesn’t have any vertices and flat faces. The surface of the sphere is completely curved.

Question 6

A prism standing on its base will always have same top and bottom views.

True

False

SOLUTION

Solution : A

The two bases of a prism are its two congruent opposite faces. Hence, a prism standing on its base will always have the same top and bottom views. In the following prism standing on its base,

the top view and the bottom view will be the same, which is the following:

Question 7

Front view of cylindrical vessel is oval.

True

False

SOLUTION

Solution : B

In the given figure of a cylinder, the portion that will be seen in the front view is colored in green. From the front, it will be seen as a rectangle.

Question 8

Identify the front view of the figure shown above.

SOLUTION

Solution : A

Front view

Question 9

Which among the figures is not a convex polyhedron?

SOLUTION

Solution : B

This figure is not a convex polyhedron. A polyhedron is said to be convex if its surface (comprising its faces, edges and vertices) does not intersect itself and the line segment joining any two points of the polyhedron is contained in the interior or surface.