Question

1. are adjacent angles always supplementary? no only if they add up to 90° they are never supplementary yes

Explanation:

Adjacent angles are two angles that share a common vertex and a common side but do not overlap. Supplementary angles are two angles whose sum is \(180^{\circ}\).
For example, consider two adjacent angles formed by two intersecting lines. But if we have two adjacent angles of \(30^{\circ}\) and \(40^{\circ}\), their sum is \(30 + 40=70^{\circ}
eq180^{\circ}\).
So adjacent angles are not always supplementary.

Answer:

No