Visualising Solid Shapes Test

Result

Visualising Solid Shapes Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Identify the convex polyhedron.

A

B

C

D

Solution

Cube is a convex polyhedron.
A polyhedron is said to be convex if its surface does not intersect itself.
Question 2
1 / -0

Which one of the following is not a convex polyhedron?

A

B

C

D
Question 3
1 / -0

Which two figures is an example of convex polyhedron?

A
figure 1 and figure 2

B
figure 2 and figure 3

C
figure 3 and figure 1

D
figure 2 and figure 4

Solution

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 of the surface. Only figure 2 and figure 4 satisfy this.
Question 4
1 / -0

The line segment joining any two points on the surface of the polyhedron lies entirely inside or on the polyhedron is called:

A
convex polyhedron

B
concave polyhedron

C
non-convex polyhedron

D
non-concave polyhedron

Solution

The line segment joining any two points on the surface of the polyhedron lies entirely inside or on the polyhedron is called convex polyhedron.
Example: Cube
Question 5
1 / -0

Cube is an example of

A
concave polyhedron

B
non-convex polyhedron

C
convex polyhedron

D
square

Solution

Cube is an example of convex polyhedron.
A polyhedron is said to be convex if its surface does not intersect itself.
Question 6
1 / -0

From which convex polyhedron 3 triangles meet at each vertex?

A
octahedron

B
cube

C
tetrahedron

D
dodecahedron

Solution

In tetrahedron polyhedron $$3$$ triangles meet at each vertex.
Question 7
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A ______ polyhedron is a figure composed of finitely many planar polygons.

A
concave

B
regular

C
convex

D
non-concave

Solution

A convex polyhedron is a figure composed of finitely many planar polygons.
Example: Cube
Question 8
1 / -0

The figure is an example of

A
regular polyhedron

B
concave polyhedron

C
irregular polyhedron

D
convex polyhedron

Solution

The diagram is an example of convex polyhedron.
As a polyhedron is said to be convex if its surface does not intersect itself, which is true for the given figure.
Question 9
1 / -0

Which of the following is a convex polyhedron?

A

B

C

D

Solution

Octahedron is a convex polyhedron.
A polyhedron is said to be convex if its surface does not intersect itself.
Question 10
1 / -0

The front and side view are same in which figure?

A
rectangle

B
square

C
triangular pyramid

D
rhombus

Solution

As shown in the figure, front and side views are triangular faces in a triangular pyramid.