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Polyhedrons - class-VIII

Description: polyhedrons
Number of Questions: 15
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Tags: maths visualising solid shapes
Attempted 0/14 Correct 0 Score 0

Solid figures with line segments as their edges are called:

  1. polygons

  2. squares

  3. cylinders

  4. polyhedrons


Correct Option: D
Explanation:

Solid figures with line segments as their edges are called  Polyhedrons

What do you call solid figures having only line segments as their edges?

  1. Polygons

  2. Squares

  3. Cylinders

  4. Polyhedrons


Correct Option: D
Explanation:

Solid figures having only line segments as their edges are called polyhedrons.

State true or false
Sphere has one surface

  1. True

  2. False


Correct Option: A

State true or false
Tetrahederan is  the polyhedron which has four vertices, four faces

  1. True

  2. False


Correct Option: A

Can a polyhedra have $4$ triangular faces only? explain

  1. Yes

  2. No

  3. Depends on meaurement

  4. None of these


Correct Option: A

Can a polyhedra have 3 triangular faces only? explain.

  1. No

  2. Yes

  3. Depends on meausrement

  4. None of these


Correct Option: A

State true or false

Sphere is  the solid object which has no vertex

  1. True

  2. False


Correct Option: A

Can a polyhedra have $10$ faces, $20$ edges and $15$ vertices?

  1. Yes

  2. No

  3. Depends on dimension

  4. None of these


Correct Option: B

State true or false
Cube is a regular polyhedron where cuboid is not.

  1. True

  2. False


Correct Option: A

State true or false
Cube ,cuboid have same number of edges, vertices and faces?

  1. True

  2. False


Correct Option: A

Which of the following is not a polyhedron?

  1. Cone

  2. Pyramid

  3. Prism

  4. Cylinder


Correct Option: A,D
Explanation:

Cone is not a polyhedron as it has a curved surface. Similarly cylinder also not a polyhedron.

Is it possible to have a polyhedron with more than 4 faces? 

  1. Possible

  2. Not possible

  3. Either

  4. Neither


Correct Option: A
Explanation:

It is possible, only if the number of faces are greater than or equal to 4

O ABC is a tetrahedron such that OA$=$OB$=$CO$=$K and $\angle AOB=\angle BOC =\angle COA =\theta$.

  1. $\left[\dfrac{\pi}{3}, \dfrac{2\pi}{3}\right]$

  2. $\left[0, \dfrac{2\pi}{3}\right]$

  3. $\left[\dfrac{\pi}{4}, \dfrac{\pi}{3}\right]$

  4. $\left[0, \dfrac{\pi}{2}\right]$


Correct Option: A

A shuttle cock used for playing badminton has the shape of the combination of: 

  1. a cylinder and a sphere

  2. a sphere and a cone

  3. a cylinder and a hemisphere

  4. a hemisphere and frustum cone


Correct Option: D
Explanation:

A shuttle cock has the shape of the combination of a hemisphere and a frustum cone. 

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