RBSE Solutions for Class 5 Maths Chapter 16 Geometry

Rajasthan Board RBSE Solutions for Class 5 Maths Chapter 16 Geometry Textbook Exercise Questions and Answers.

RBSE Class 5 Maths Solutions Chapter 16 Geometry

Intext Questions:

Question 1. 
Explain the concept of right angle on the basis of folding paper.
Solution: 
By fold of paper - Take the square paper, fold it right in the middle in a such way that both the side cover each other, now fold once in the same way,

Now, open this paper the picture on the paper, two lines will be seen each other and four angles with be seeing to
be formed.

Here every angle is a right angle.

 

Question 2. 
Activity - Look for situation of right angle, acute angle, obtuse angle and straight angle in your surrounding shapes and comers.
Solution: 
1. Meeting place of two walls makes right angle.
2. Between chairs legs and floor, right angle is formed.
3. Acute angle is formed between the blades of a fan.
4. In a clock between hour hand, minute hand and second hand different angles are formed.
 
Question 3.
Notice the hour and minute hand of a watch at 6 O' clock. Are they in a straight line?
Solution:
Yes, they are in a straight line.

 

Practice Work:

Question 1. 
Recognize the following geometrical figures and mentioned them in the form of acute angle, right angle or obtuse angle.

Acute Angle vertex = ____________
Right angle vertex = ____________        
Obtuse angle vertex = ____________     
Solution: 
Acute angle vertex A, B, C, D, E, M, V 
Right angle vertex F, G, H, I, J, L, T, U 
Obtuse angle vertex K, N, O, P, Q, R, S,W.

 

Question 2. 
What is the crescent shaped tool in your geometry box called?
Solution:
Protractor

It is used to measure the angles.
 
Exercise:

Question 1.
Using protractor, measure the
 

Solution:  
(i) 30°
(ii) 100°
(iii) 90°
(iv) 110°
(v) 153°
(vi) 180°.

 

Important Questions:

Multiple Choice Questions:

Question 1.    
Value of right angle will be :
(a) 180°    
(b) 90°
(c) 270°    
(d) 360°
Solution:
(b) 90°

Question 2.
Value of acute angle will be :
(a) more than 90° 
(b) less than 180° 
(c) less than 90° 
(d) more than 180°
Solution:
(c) less than 90° 

 

Question 3.
Angle formed by rotating one pencil upto one-fourth round will be :
(a) straight angle 
(b) obtuse angle 
(c) acute angle 
(d) right angle
Solution:
(d) right angle

Question 4.    
All the angles in following figure are :

(a) obtuse angles
(b) one obtuse, 2 acute angles
(c) acute angles
(d) right angles
Solution:
(c) acute angles

Question 5.    
Value of straight angle will be :
(a) 180°
(b) 90°
(c) 60°    
(d) 360°
Solution:
(a) 180°

 

Very Short/Short Answer Type Questions:

Question 1. 
Following are some angles. Recognize them and write their names.

 
Solution:  
(1) Right angle
(2) Obtuse angle
(3) Right angle
(4) Acute angle
(5) Obtuse angle
(6) Obtuse angle
(7) Right angle
(8) Acute angle
(9) Obtuse angle
(10) Acute angle
(11) Obtuse angle
(12) Acute angle
(13) Acute angle.

 

Question 2. 
Where clock hands make right angle, Tick the right (✓).

(i)

Solution:

(ii)

Solution:

 
 
Question 3.
In the following figures, see where the angles are formed? Make the angles greater than right angle as o and equal to right angle as ✗ and smaller than right angle as ✓.
 

Solution:
Marking given figures by sign o, ✗and ✓.