Quadrilateral used in a sentence

Quadrilateral in a sentence as a noun

"You may be surprised how good you really can get once you start thinking outside the quadrilateral.

'Error' is defined as the sum of the distances of all travel waypoints to the nearest quadrilateral path line.

Does it mean that a shape with four sides of unequal lengths isn't quadrilateral?Put this in a more concrete scenario.

As someone with only a basic knowledge of FEA, why would a quadrilateral mesh ever make more sense than triangular?

If one point is in the interior of the other three, you get three different, nonconvex quadrilaterals.

If the ball's path intersects the quadrilateral, its velocity needs to be reflected at the intersection point.

Quadrilateral in a sentence as an adjective

If you make three corners of a quadrilateral perpendicular, the fourth is forced to be perpendicular.

I guess to prove that the surface is not flat, you need to measure the more distances, like measuring the four sides of a quadrilateral and then the two diagonal.

Each of these devices is the diagonal of a quadrilateral; when the device is in it's 'on' state, the diagonal is long, and when it's in the 'off' state the diagonal is short.

Maybe...A rectangle has a heightA rectangle has a widthA rectangle has a set of quadrilateral propertiesDon't get me wrong, sometimes the 'is a' relationship is the true relationship.

Why is this an example of some triangle-y thing, and not an example of an quadrilateral whatever?The author is just massaging and manipulating the data to make whatever points he wants.