1.  Are the angles marked 1 and 2 adjacent? (Fig). If they are not adjacent, say, ‘why’.

Answers (1)
D Devendra Khairwa

The condition for being adjacent angles are:- 

(a)  they have a common vertex 

(b)  they have common arm

Hence in the given figures:- 

(i)  These angles are adjacent angles as they agree above conditions.

(ii) The angles are adjacent angles.

(iii) These angles are not adjacent as their vertices are different.

(iv) These are adjacent angles.

(v) The angles are adjacent angles.