Chapter 5 Understanding Elementary Shapes

Class 6 Mathematics Chapter 5| Understanding Elementary Shapes | Exercise 5.4 1. What is the measure of (a) a right angle? (b) a straight angle? Answer: (a) 90° (b) 180° 2. Say True or False : (a) The measure of an acute angle < 90°. (b) The measure of an obtuse angle < 90°. (c) The measure of a reflex angle > 180°. (d) The measure of one complete … [Read more...] about Exercise 5.4

Class 6 Mathematics Chapter 5| Understanding Elementary Shapes | Exercise 5.3 1. Match the following : (i) Straight angle (a) Less than one-fourth of a revolution (ii) Right angle    (b) More than half a revolution (iii) Acute angle   (c) Half of a revolution (iv) Obtuse angle (d) One-fourth of a revolution (v) Reflex angle   (e) Between 1 4 and 1 2 of a revolution   … [Read more...] about Exercise 5.3

Class 6 Mathematics Chapter 5 | Understanding Elementary Shapes | Exercise 5.2 1. What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from (a) 3 to 9 (b) 4 to 7 (c) 7 to 10 (d) 12 to 9 (e) 1 to 10 (f) 6 to 3 Answer: a) When the hour hand goes from 3 to 9 , it will rotate by 2 right angles. b) When … [Read more...] about Exercise 5.2

Class 6 Mathematics Chapter 5 | Understanding Elementary Shapes | Exercise 5.1 1. What is the disadvantage in comparing line segments by mere observation? Answer: The disadvantage in comparing line segments by mere observation is chance of error due to improper viewing. 2. Why is it better to use a divider than a ruler, while measuring the length of a line … [Read more...] about Exercise 5.1