IXL | Area and perimeter of rectangles: find the missing side length

The perimeter of the rectangle is

centimeters

and the two missing sides have the same length. What is the length of one of the missing

sides?

centimeters

ref_doc_title.

Learn with an example

question

The width of the rectangle is

yards

The area is

square yards

What is the length of the rectangle?

sq yd

yards

key idea

The area of a rectangle is equal to its length times its width.

length

width

When the length and width are measured in

yards

(

)

the area is measured in

square yards

(

sq yd

)

solution

You know the width is

yards

and the area is

square yards

To find the length, write a multiplication sentence for the area of the rectangle.

?	×	2	=	6

length		width		area
(yd)		(yd)		(sq yd)

You can use a multiplication fact to find the length.

The length of the rectangle is

yards

Looking for more? Try these:

Lesson: Rectangles

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Teacher tools

Work it out

Not feeling ready yet? These can help:

PP.2Perimeter of rectangles

OO.10Find the area of rectangles and squares

P.6Subtract two-digit numbers - with regrouping

X.7Division facts up to 10

Lesson: Rectangles

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