Question

In the adjoining figure, ABCD is a quadrilateral.
(i) How many pairs of adjacent sides are there? Name them.
(ii) How many pairs of opposite sides are there? Name them.
(iii) How many pairs of adjacent angles are there? Name them.
(iv) How many pairs of opposite angles are there? Name them.
(v) How many diagonals are there? Name them.

Answer 1

(i) There are four pairs of adjacents sides which are (AB,BC), (BC,CD), (CD,DA) and (DA,AB)
(ii) There are two pairs of opposite sides whicha are (AB,CD) and (BC,AD)
(iii) There are four pairs of adjacent angles which are $(\angle A,\angle B)(\angle B,\angle C),(\angle C,\angle D)and(\angle D,\angle A)$
(iv) There are two pairs of opposite angles which are $(\angle A,\angle C)and(\angle B,\angle D)$
(v) There are two diagonals which are AC and BD.