Wikipedia says that
The shape of a simple quadrilateral is fully determined by the lengths of its sides and one diagonal.
but I have my doubts. For example, the two quadrilaterals in this picture both have the same side lengths and the same yellow diagonal, but are not the same.
Am I missing something here, or are simple quadrilaterals not actually determined (all sides and angles) by the lengths of four sides and a diagonal? If not, what about a convex quadrilateral? Would that be fully determined by those lengths?