http://www.usatestprep.com/modules/gallery/files/23/2351/2351.gif
Sally is calculating the perimeters of a number of rectangles, such as the one shown here. She uses the formula P = 2l + 2w. Her younger brother Joe comes by and suggests simplifying the formula to P = 4w. Sally corrects Joe's algebra, but he tries his formula on a rectangle and gets the correct answer! (She checks his work.) What can Sally conclude from this?

A)
Joe's rectangle is oblong.

B)
Joe's rectangle is a square.

C)
Joe's rectangle has no length.

D)
Joe's rectangle wider than it is

Question

http://www.usatestprep.com/modules/gallery/files/23/2351/2351.gif
Sally is calculating the perimeters of a number of rectangles, such as the one shown here. She uses the formula P = 2l + 2w. Her younger brother Joe comes by and suggests simplifying the formula to P = 4w. Sally corrects Joe's algebra, but he tries his formula on a rectangle and gets the correct answer! (She checks his work.) What can Sally conclude from this?
	

A)
	Joe's rectangle is oblong. 	
	

B)
	Joe's rectangle is a square. 	
	

C)
	Joe's rectangle has no length. 	
	

D)
	Joe's rectangle wider than it is

anonymous · Answer

@iGreen

fortytherapper · Answer

B. Joe's rectangle is a square.

The formula for the perimeter of a square is x+x+x+x or 4x

**Some rectangles are squares because it holds the properties of a square, as it this case, though it won't happen all the time**