Picture frame in the shape of a rectangle . he used 36 glass stones that measure 1foot on each side. there are 6 stones on one side of the picture frame. how many stones are on the other sides.

In a rectangle, the opposite sides are of equal legnths

on one side, there are 6 stones
on the opposite side, there are the same number of stones (6)

(if you calculate then area=legnth times width, area=36, legnth of one sides=6, 36=6 times width divide 6, ,      6=width, legnth=6, legnth=width=6)

the answer is 6 stones