Question

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Answer 1

Answer:

(i) Angle – When two rays originate from the same end point, then an angle is formed.

(ii) Interior of an angle – The interior of ∠BAC is the set of all points in its plane which lie on the same

side of AB as C and also on the same side of AC as B.

(iii) Obtuse angle – An angle whose measure is more than 90o but less than 180o

is called an obtuse angle.

(iv) Reflex angle – An angle whose measure is more than 180o but less than 360o

is called a reflex angle.

(v) Complementary angles – Two angles are said to be complementary, if the sum of their measure is 90o

.

(vi) Supplementary angles – Two angles are said to be supplementary if the sum of their measures is 180o

.