Question

In a quadrilateral, define the adjacent sides.

Answer 1

Definition of adjacent sides

The adjacent sides of a quadrilateral are two sides with a common (vertex) end point.

Here,

$AB\&BC,BC\&CD,CD\&DA$and $DA\&AB$are the four pairs of adjacent sides in the given quadrilateral $ABCD$.

Hence, the adjacent sides of a quadrilateral are two sides with a common end point (vertex).