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Match the following:
(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 the end 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 the end 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 the end 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
(ii) Right angle
(d) one-fourth a revolution
(iii) Acute angle
(a) less than one-fourth a revolution
(iv) Obtuse angle
(e) between the end of a revolution
(v) Reflex angle
(b) more than half a revolution
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