**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) 180 ^{0} or half of a revolution**

**ii) Right angle = d) 90 ^{0} or one-fourth of a revolution**

**(iii) Acute angle = a) less than 90 ^{0} or less than one-fourth of a revolution**

Figure showing less than 90

^{0}or less than one-fourth of a revolution

**(iv) Obtuse angle = e) more than 90 ^{0} but less than 180^{0} or between 1 / 4 and 1 / 2 of a revolution **

Figure showing more than 90

^{0}but less than 180

^{0}or between 1 / 4 and 1 / 2 of a revolution

**(v) Reflex angle = b) more than 180 ^{0} but less than 360^{0} or more than half a revolution**

Figure showing more than 180

^{0}but less than 360

^{0}or more than half a revolution

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