In the given figure, which pair of angles are not supplementary?
∠1 = ∠2
∠2 = ∠3
∠3 = ∠1
∠4 = ∠1
All the possible pairs of adjacent angles are supplementary. Whereas vertically opposite angles are not.
In the figure shown, which of the angles pair are not supplementary – if lines t and l are not perpendicular?
(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.