Question

The adjacent sides share common (side/vertex) and adjacent angles share common (side/vertex).

Answer 1

Adjacent sides are the sides of polygon that share the vertex.

In the above figure, $PQ$ and $QR$ are the adjacent sides and shares $Q$ as common vertex.

Adjacent angles are those angles in the polygon that shares the common side.

Here in the above figure, $\angle PQR$ and $\angle SRQ$ are the adjacent angles having $QR$ side as common side.

So, adjacent sides share vertex and adjacent angles share side.