Tangential

I don't understand why you're bringing up tangential issues that have nothing to do with the problem at hand.

The conference was enlightening, but some of the presenters' tangential anecdotes seemed unnecessary to the main topics at hand.

The tangential lines intersect at the point of the curve.

The tangential speed of the saw blade was very high.

The movie's subplot was tangential to the main storyline.

Her question was tangential to the theme of the conference.

The movie had a tangential relationship to the book.

Her research was tangential to the topic of the conference.

The writer's tangential research provided a unique perspective on the topic.