RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes

Rajasthan Board RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes Important Questions and Answers.

Rajasthan Board RBSE Solutions for Class 8 Maths in Hindi Medium & English Medium are part of RBSE Solutions for Class 8. Students can also read RBSE Class 8 Maths Important Questions for exam preparation. Students can also go through RBSE Class 8 Maths Notes to understand and remember the concepts easily. Practicing the class 8 maths chapter 6 try these solutions will help students analyse their level of preparation.

RBSE Class 8 Maths Chapter 10 Important Questions Visualizing Solid Shapes

Multiple Choice Questions:

Question 1.
Plane figures are called
(a) multi-dimensional
(b) three-dimensional
(c) two-dimensional
(d) none of the above
Answer:
(c) two-dimensional

Question 2.
Example of two-dimensional figure is
(a) cylinder
(b) square
(c) cone
(d) cuboid
Answer:
(b) square

Question 3.
Every solid shape is made up of various two dimensional figures. These
(a) edges
(b) vertices
(c) faces
(d) cuboid
Answer:
(c) faces

RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes

Question 4.
Euler’s formula is
(a) F + V = E + 2
(b) F - V = E - 2
(c) V + E = F + 2
(d) V - E = F - 2
Answer:
(a) F + V = E + 2

Question 5.
The point where the edges of a solid, is called
(a) face
(b) surface
(c) vertex
(d) pyramid
Answer:
(c) vertex

Fill in the blanks:

Question 1.
Cuboid is a ________ shape.
Answer:
three-dimensional

Question 2.
3D objects will have ________  views from different angles.
Answer:
different 

Question 3.
For any polyhedron, F + V = ________ is true.
Answer:
E + 2

Question 4.
There is no reference or perspective in a ________
Answer:
map

RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes

Question 5.
________ is very important for drawing a picture but it is not relevant for a map.
Answer:
Perspective.

Very Short Answer Type Questions:

Question 1.
What do you mean by three dimensional shapes?
Answer:
The solids having three measure-ments, length, breadth and height or depth, are called three dimensional shapes.

Question 2.
What are two dimensional shapes?
Answer:
The plane figures having two measurements, length and breadth, are called two dimensional shapes.

Question 3.
Give 3 examples of two dimen-sional shapes.
Answer:
Triangle, rectangle circle etc.

Question 4.
Give 3 examples of three dimensional shapes.
Answer:
Cuboid, sphere, cylinder etc.

Question 5.
What is the definition of Prism?
Answer:
A prism is a polyhedron whose base and top are congruent polygons and whose other faces, i.e., lateral faces are parallelogram in shapes.

Question 6.
What do you mean by pyramid?
Answer:
A polyhedron having a polygonal base and triangular sides with a common vertex, is called a pyramid.

Question 7.
Define a regular polyhedrons.
Answer:
A polyhedron is said to be regular if its faces are made up of regular polygons and the same number of faces meet at each vertex.

RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes

Short Answer Type Questions:

Question 1.
One vertex of a cube in cut equidistance from her three sides as shown in fig. How many faces and vertices in new fig.
Answer:
RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes 1
Number of faces (F) = 7
Number of vertices (V) = 10

Question 2.
Using Euler’s formula find the missing numbers.
RBSE Class 8 Maths Important Questions Chapter 10 Visualizing Solid Shapes 2
Answer:
For A Polyhedron
Number of faces = ?
Number of vertices = 6,
Number of Edges =12

By using Euler’s formula F + V = E + 2
or F = E + 2 - V = 12 + 2- 6
F = 14 - 6 = 8 Number of faces F = 8 

For B Polyhedron:
Number of faces = 5;
Number of vertices = ?,
Number of Edges = 9

By using Euler’s formula F + V = E + 2
or V = E + 2 - F = 9 + 2- 5 = 6
Number of vertices = 6

Prasanna
Last Updated on May 18, 2022, 11:48 a.m.
Published May 18, 2022