May you show a picture of the question? :)
The four angles are congruet. So each angle is 90°.
So the figure is a rectangle. It could be a square but not necessarily. You can consider a square a special case of rectangle.
The four angles of a rectangle are congruent. And the opposite sides are congruent.
The four angles of a square are congruent. The opposite sides are congruent, furthermore the four sides are congruent.
we have given for 12 ounces is $40.80.
we need to find the rate for unit ounce.
we know that
.
so one ounce cost about $3.4.