NCERT MCQ Questions for Class 6 Maths Chapter 5 Understanding Elementary Shape with Answers. MCQ Questions for Class 6 Maths with Answers were prepared based on the latest exam pattern. We have provided Knowing Our Numbers Class 6 Maths MCQs Questions with Answers to help students understand the concept very well
MCQ
Question 1.
The angle measure for one complete revolution is
(a) 180°
(b) 360°
(c) 90°
(d) none of these.
Answer
Answer: (b)
Question 2.
The angle measure for half a revolution is
(a) 90°
(b) 180°
(c) 360°
(d) none of these.
Answer
Answer: (b)
Question 3.
The angle measure for one-fourth revolution is
(a) 90°
(b) 360°
(c) 180°
(d) none of these.
Answer
Answer: (a)
Question 4.
Through what angle measure does the hour hand of a clock turn through, when it goes from 3 to 9?
(a) 90°
(b) 360°
(c) 180°
(d) none of these.
Answer
Answer: (c)
Question 5.
Through what angle measure does the hour hand of a clock turn through, when it goes from 5 to 8?
(a) 90°
(b) 180°
(c) 360°
(d) none of these.
Answer
Answer: (a)
Question 6.
Through what angle measure does the hour hand of a clock turn through, when it goes from 12 to 9?
(a) 270°
(b) 180°
(c) 360°
(d) 90°.
Answer
Answer: (a)
Question 7.
Through what angle does the hour hand of a clock turn through, when it goes from 2 to 11?
(a) 270°
(b) 90°
(c) 360°
(d) 180°.
Answer
Answer: (a)
Question 8.
Through what angle does the hour hand of a clock turn through, when it goes from 6 to 3?
(a) 90°
(b) 180°
(c) 270°
(d) 360°.
Answer
Answer: (c)
Question 9.
What part of a revolution have you turned through if you stand facing north and turn clockwise to face west?
(a) 14
(b) 12
(c) 34
(d) none of these.
Answer
Answer: (c)
Question 10.
What part of a revolution have you turned through if you stand facing east and turn clockwise to face west?
(a) 14
(b) 12
(c) 34
(d) none of these.
Answer
Answer: (b)
Question 11.
What part of a revolution have you turned through, if you stand facing north and turn clockwise to face east?
(a) 14
(b) 12
(c) 34
(d) none of these
Answer
Answer: (a)
Question 12.
Find the number of right angles turned through by the hour hand of a clock when it goes from 12 to 3.
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (a)
Question 13.
Find the number of right angles turned through by the hour hand of a clock when it goes from 4 to 10.
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (b)
Question 14.
Find the number of right angles turned through by the hour hand of a clock when it goes from 3 to 12.
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (c)
Question 15.
How many right angles do you make if you start facing north and turn clockwise to south?
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (b)
Question 16.
How many right angles do you make if you start facing east and turn clockwise to south?
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (a)
Question 17.
How many right angles do you make if you start facing south and turn clockwise to east?
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (c)
Question 18.
How many right angles do you make if you start facing east and turn clockwise to east?
(a) 1
(b) 2
(c) 3
(d) 4.
Answer
Answer: (d)
Question 19.
The measure of a right angle is
(a) 45°
(b) 90°
(c) 60°
(d) 180°.
Answer
Answer: (b)
Question 20.
The measure of a straight angle is
(a) 90°
(b) 45°
(c) 180°
(d) 60°.
Answer
Answer: (c)
Important Questions
Question 1.
Which of the following line-segments is longer?
Solution:
By using divider, CD¯¯¯¯¯¯¯¯ seems to be longer than AB¯¯¯¯¯¯¯¯ .
Question 2.
How many line segments are used in making a triangle?
Solution:
Three line segments are used to make a triangle.
Question 3.
What is the measure of straight angle?
Solution:
The measure of straight angle is 180°.
Question 4.
What is complete angle?
Solution:
The angle for one revolution is called a complete angle.
Question 5.
Find the number of right angle turned through by the hour hand of a clock when it goes from 3 to 6.
Solution:
When the hour hand of a clock goes from 3 to 6, it turns through a right angle.
Question 6.
Draw the rough sketch of the following:
(a) Acute angle
(b) Obtuse angle
(c) Reflex angle
Solution:
(a) Acute angle
(b) Obtuse angle
(c) Reflex angle
Question 7.
Identify the types of angle from the given figures:
Solution:
(a) Obtuse angle
(b) Acute angle
(c) Right angle
(d) Straight angle
(e) Reflex angle
Question 8.
What are the degree measures of the following angles?
(a) Right angle
(b) A complete angle
(c) Straight angle
Solution:
(a) Degree measure of a right angle is 90°.
(b) Degree measure of a complete angle is 360°.
(c) Degree measure of a straight angle is 180°.
Question 9.
What are the types of the given triangles on the basis of angles?
Solution:
(a) Acute angled triangle.
(b) Obtuse angled triangle.
(c) Right angled triangle.
Question 10.
What are the types of the following triangles on the basis of sides?
Solution:
(a) Scalene triangle.
(b) Equilateral triangle.
(c) Isosceles triangle.
Basic Geometrical Ideas Class 6 Extra Questions Short Answer Type
Question 11.
In the given figure, name the following angles as acute, obtuse, right, straight or reflex.
(a) ∠QOY
(b) ∠YOP
(c) ∠ROX
(d) ∠QOX
(e) ∠POQ
Solution:
(a) ∠QOY = acute angle.
(b) ∠YOP = obtuse angle.
(c) ∠ROX = right angle.
(d) ∠QOX = reflex angle.
(e) ∠POQ = straight angle.
Question 12.
In the given figure, find the measure of the angles marked with a, b, c, d, e and f.
Solution:
∠a = 180° -129° = 51°
∠b = 180° – (51° + 92°)
= 180° – 143° = 37°
∠c = 180° – 88° = 92°
∠d = 180° – 152° = 28°
∠e = 180° – 143° = 37°
∠f= 180° – (∠e + ∠d)
= 180° – (37° + 28°)
= 180°- 65°= 115°
∠g = 180° – ∠f = 180° – 115° = 65°
Question 13.
Classify the given triangles whose sides are indicated on them.
Solution:
(a) All sides are different. So, it is a scalene triangle.
(a) Lengths of two sides of the triangle are same. So, it is an isosceles triangle.
(b) All sides are unequal and one angle is right angle. So it is scalene right angled triangle.
(c) Two sides of this triangle are equal. So, it is an isosceles triangle.
Question 14.
Complete each of the following, so as to make a true statement:
(a) A ……….. is a rectangle with a pair of adjacent sides equal.
(b) A parallelogram with a pair of adjacent sides equal is called a ………. .
(c) A quadrilateral having exactly one pair of parallel sides is called a …….. .
(d) A quadrilateral having both pairs of opposite sides parallel, is called a ……… .
(e) A parallelogram whose each angle is a right angle is called a ………… .
Solution:
(a) Square
(b) Rhombus
(c) Trapezium
(d) Parallelogram
(e) Rectangle.
Basic Geometrical Ideas Class 6 Extra Questions Long Answer Type
Question 15.
Verify the ‘Euler’s formula’ V + F = E + 2 for the given figures.
(a) A triangular prism having 5 faces, 9 edges and 6 vertices.
(b) A rectangular prism with 6 faces, 12 edges and 8 vertices.
(c) A pentagonal prism with 7 faces, 15 edges and 10 vertices.
(d) A tetrahedron -with 4 faces, 6 edges and 4 vertices.
Solution:
(a) Here, F = 5, E = 9 and V = 6
∴ V + F = E + 2
⇒ 6 + 5 = 9 + 2
⇒ 11 = 11
Hence, verified.
(b) Here, F = 6, E = 12 and V = 8
∴ V + F = E + 2
⇒ 8 + 6 = 12 + 2
⇒ 14 = 14
Hence, verified.
(c) Here, F = 7, E = 15 and V = 10
∴ V + F = E + 2
⇒ 10 + 7 = 15 + 2
⇒ 17 = 17
Hence, verified.
(d) Here, F = 4, E = 6 and V = 4
∴ V + F = E + 2
⇒ 4 + 4 = 6 + 2
⇒ 8 = 8
Hence, verified.