Sayings coined from geometric terms

Posted by R. Berg on November 28, 2005

In Reply to: Sayings coined from geometric terms posted by stacy on November 27, 2005

: anyone know any sayings coined from geometric terms, like "going in circles" or "she's a square"?

Eternal triangle, love triangle, square deal, square meal, circular reasoning, walk the line, straight as an arrow, get the point, angling for a raise (a visit, a compliment, anything), point of no return, family circle, social circle, circle of friends, Q.E.D., pyramid scheme, circle your wagons, fair and square, throw you a curve ball,...

But surely you can think of some yourself.