# NCERT Class 6 Maths Chapter 05

## Class 6 Maths- Exercise 5.5

1. Which of the following are models for perpendicular lines: (a) The adjacent edges of a table top Ans. Figure showing adjacent edges which are perpendicular to each other. Therefore, yes, the adjacent edges of a table top is model of a perpendicular line (b) The lines of a railway track. Ans. Figure showing the …

## Class 6 Maths- Exercise 5.4

1. What is the measure of(i) a right angle? (ii) a straight angle? Ans. (i) The measure of a right angle is 900(ii) The measure of a straight angle is 1800 2. Say True or False : (a) The measure of an acute angle < 90°.Ans. TrueReason – The measure of an acute angle < …

## Class 6 Maths- 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 ¼ and ½ of a revolution                                                                                 (f) One complete revolution …

## Class 6 Maths- Exercise 5.1

(01) What is the disadvantage in comparing line segments by mere observation? Sol. a. Two line segments with slight difference in length cannot be differentiated by mere observationb. If you are doing architectural work (designing buildings etc) you need perfect length of lines. Comparing the line segment of wall just by observation can lead to …