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

(i) Straight angle = c) 180⁰ or half of a revolution

ii) Right angle = d) 90⁰ or one-fourth of a revolution

(iii) Acute angle = a) less than 90⁰ or less than one-fourth of a revolution
Figure showing less than 90⁰ or less than one-fourth of a revolution

(iv) Obtuse angle = e) more than 90⁰ but less than 180⁰ or between 1 / 4 and 1 / 2 of a revolution      
Figure showing more than 90⁰ but less than 180⁰ or between 1 / 4 and 1 / 2 of a revolution

(v) Reflex angle = b) more than 180⁰ but less than 360⁰ or more than half a revolution
Figure showing more than 180⁰ but less than 360⁰ or more than half a revolution

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2. Classify each one of the following angles as right, straight, acute, obtuse or reflex