Question

Q18.) In a quadrilateral ABCD, name the following
(a) pair of opposite sides
(b) pair of adjacent sides
(c) diagonals​

Answer 1

Answer:

(a)

Two sides of a quadrilateral are said to be adjacent sides of the quadrilateral, if they have a common end point

From the figure,

(AB,BC),(BC,CD),(AB,AD) are the pair of adjacent sides of quadrilateral.

(b)

Two sides of a quadrilateral are said to be opposite sides of the quadrilateral, if they are not adjacent.

From the figure,

(AB,DC) and (BC,AD) are the pair of opposite sides of the quadrilateral

(c)

Two angles of a quadrilateral are said to be a adjacent angles of the quadrilateral, if they have a side of the quadrilateral in common.

(∠A,∠B),(∠B,∠C),(∠C,∠D),(∠D,∠A) are the pair of adjacent angles of quadrilateral.

(d)

Two angles of a quadrilateral are said to be opposite angles of the quadrilateral, if they are adjacent

.

(∠A,∠C),(∠B,∠D) are the pair of opposite angles of quadrilateral