This is in continuation of my earlier post here.
On pg.#8-9, question #8 concerns finding a quantitative measure for distance function that can help to find closeness/similarity between two rectangles. Also, the attributes of concern are : length, height, aspect ratio, length
of the diagonal, angle between the diagonals, etc.
The part (c) concerns showing which of the two pairs among the $3$ possible for the $3$ points ($(3,2), (4,3), (5,4)$) representing rectangles are most similar or closer in shape.