# Match the followings:

# (i) Straight angle (a) less than one-fourth 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 a revolution

# (v) Reflex angle (e) between and of a revolution

# (f) One complete revolution

When two lines intersect at a point, the measure of the “opening” between these two lines is called an “Angle”

## Answer:

(i) Straight angle

(c) half of a revolution

(ii) Right angle

(d) one-fourth a revolution

(iii) Acute angle

(a) less than one-fourth a revolution

(iv) Obtuse angle

(e) between and of a revolution

(v) Reflex angle

(b) more than half a revolution

## Explanation:

(i) Straight angle is 180 degrees, hence

(c) half of a revolution

(ii) Right angle is 90 degrees, hence

(d) one-fourth a revolution

(iii) Acute angle is less than 90 degrees, hence

(a) less than one-fourth a revolution

(iv) Obtuse angle is more than 90 degrees, hence

(e) between and of a revolution

(v) Reflex angle is more than 180 degrees, hence

(b) more than half a revolution

**Thus,**

**(i) Straight angle**

(c) half of a revolution

(c) half of a revolution

**(ii) Right angle**

(d) one-fourth a revolution

(d) one-fourth a revolution

**(iii) Acute angle **

(a) less than one-fourth a revolution

(a) less than one-fourth a revolution

**(iv) Obtuse angle **

(e) between and of a revolution

(e) between and of a revolution

**(v) Reflex angle**

(b) more than half a revolution

(b) more than half a revolution