Question

In the figure, 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?

Answer 1

In the figure, ABCD is a quadrilateral
(i) Pairs of adjacent sides are AB, BC, BC, CD, CD, DA, DA, AB.
(ii) Pairs of opposite sides are AB and CD; BC and AD.
(iii) There are four pairs of adjacent sides.
(iv) There are two pairs of opposite sides.
(v) Pairs of adjacent angles are $\angle A,\angle B;\angle B,\angle C;\angle C,\angle D;\angle D,\angle A.$
(vi) Pairs of opposite angles are $\angle A$ and $\angle C$; $\angle B$ and $\angle D$.
(vii) There are four pairs of adjacent angles.
(viii) There are two pairs of opposite angles.