In Fig. 16.19, ABCD is a quadrilateral.


(i) Name a pair of adjacent sides.


(ii) Name a pair of opposite sides.


(iii) How many pairs of adjacent sides are there?


(iv) How many pairs of opposite sides are there?


(v) Name a pair of adjacent angles.


(vi) Name a pair of opposite angles.


(vii) How many pairs of adjacent angles are there?


(viii) How many pairs of opposite angles are there?

(i) Name a pair of adjacent sides.


Adjacent sides are: AB, BC, CD and DA


(ii) Name a pair of opposite sides.


Adjacent sides are: AB CD and BC DA


(iii) How many pairs of adjacent sides are there?


Four pairs of adjacent sides.


AB BC, BC CD, CD DA and DA AB


(iv) How many pairs of opposite sides are there?


Two pairs of opposite sides.


AB DC and DA BC


(v) Name a pair of adjacent angles.


Four pairs of Adjacent angles are: DAB ABC, ABC BCA, BCA CDA and CDA DAB


(vi) Name a pair of opposite angles.


Pair of opposite angles are: DAB BCA and ABC CDA


(vii) How many pairs of adjacent angles are there?


Four pairs of adjacent angles. DAB ABC, ABC BCA, BCA CDA and CDA DAB


(viii) How many pairs of opposite angles are there?


Two pairs of opposite angles. DAB BCA and ABC CDA


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