# Free Visualising Solid Shapes 02 Practice Test - 8th Grade

Which of the following is not a polyhedron?

A.

Cube

B.

Cone

C.

Cylinder

D.

Prism

#### SOLUTION

Solution : B and C

A polyhedron is a three-dimensional solid figure in which each side is a flat surface. These flat surfaces are polygons and are joined at their edges. Since cylinder and cone are the solids that have curved surfaces, they are called non-polyhedrons. On the other hand, cube and prism are polyhedrons.

Which of the given solids has the maximum number of vertices?

A.

Cone

B.

Cuboid

C.

Sphere

D.

Cylinder

#### SOLUTION

Solution : B

Cone has one vertex.

Cuboid has 8 vertices.

Cylinder and sphere have no vertices.

If a right angled triangle is rotated about one of its perpendicular sides, then the shape obtained will be a ________ .

A.

cone

B.

cylinder

C. cube
D. cuboid

#### SOLUTION

Solution : A

In the above figure, l is the slant height, h is the height and r is the radius. h and r are perpendicular to each other. So, h r and l forms a right angled triangle.

When we rotate the triangle about one of its perpendicular sides, then the shape obtained will be a cone as illustrated in the figure.

Which of the following is obtained by stacking rectangles?

A.

Cube

B.

Cone

C. Pyramid
D. Cuboid

#### SOLUTION

Solution : D

If we stack rectangles by keeping one on the other, then we will get a cuboid, as shown in the figure.

To form a hollow cuboid, you need to arrange 6 identical rectangles accordingly.

A.

True

B.

False

#### SOLUTION

Solution : B

To form a hollow cuboid, we need to arrange 6 rectangles, where the rectangles opposite to each other are congruent. Only rectangles which are opposite to each other need to be identical.

Sphere is a __ dimensional figure.

#### SOLUTION

Solution :

​Sphere is a 3-dimensional figure as it occupies space.

Identify the solid figure that has the following views.

A.

Rectangular prism

B.

Triangular prism

C.

Hexagonal

D.

Pentagon

#### SOLUTION

Solution : B

The given views belong to the following triangular prism:

Which of the following solids can be formed using the given net?

A.

B.

C.

D.

#### SOLUTION

Solution : C

As we can see, there are two triangular parts with same dimensions and three rectangular faces with same dimensions in the given net.

The solid formed must have two triangular faces and three rectangular faces on folding the net.

Railway station is further east compare to post office.

A.

True

B.

False

#### SOLUTION

Solution : A

Yes, Railway station is further east compare to post office.

Which shape among the following does not have edges?

A.

Triangular pyramid

B.

Rectangular prism

C.

Sphere

D.

Pentagon

#### SOLUTION

Solution : C

An edge is a line joining the vertices. Among the four given options, a sphere has a curved surface and has no vertex. So, a sphere does not have any edges.