If you look at examples on Geometer's Sketchpad (GSP) or similar, you will notice that one side ofthe largest
inscribed (and wedged) squares always lies on a side of the triangle. This is true in general, for it is known that if a
polygon fits in a triangle, then it fits with one of its sides lying on a side ofthe triangle [5].
The following technique, due to G. Polya [4], was given in MPYG. It shows how to build the largest inscribed square
on a side of a given triangle which has no obtuse angle. Start with a triangle like AABC below left, and an inscribed
square DEFG on base BC, as shown in Figure 2a. Then construct a line segment BH from B through G to AC at H, and
mBH dilate square DEFG about the vertex B by the ratio to get the largest square D'E'E'G' on base BC where G' = H.