Chapter 5 Understanding Elementary Shapes Ex. 5.3
Question 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 and of a revolution.
– (f) One complete revolution.
Solution:
(i) Straight angle ↔ (c) Half of a revolution.
(ii) Right angle ↔ (d) One-fourth of a revolution.
(iii) Acute angle ↔ (a) Less than one-fourth of a revolution.
(iv) Obtuse angle ↔ (e) Between and of a revolution.
(v) Reflex angle ↔ (f) One complete revolution, right, acute, obtuse or reflex.
Question 2.
Classify each one of the following angles
Solution:
(a) Acute angle
(b) Obtuse angle
(c) Right angle
(d) Reflex angle
(e) Straight angle
(f) Acute angle