What are the conditions that must be satisfied to construct a quadrilateral?
To construct a quadrilateral we need four line segments forming a simple closed curve or a polygon.
(a) What are the three conditions that must be satisfied for two angles to be adjacent? [3 MARKS] (b) In the given figure, \(\angle 1\) and \(\angle 2\) are supplementary angles. If \(\angle 1\) decreases, then \(\angle 2\) will _______ so that both the angles are still supplementary.