IXL | Find the missing side length of a rectangle

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 length of the rectangle is

inches

The area is

square inches

What is the width of the rectangle?

sq in

inches

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

inches

(

)

the area is measured in

square inches

(

sq in

)

solution

You know the length is

inches

and the area is

square inches

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

8	×	?	=	24

length		width		area
(in)		(in)		(sq in)

You can use a multiplication fact to find the width.

The width of the rectangle is

inches

Looking for more? Try these:

Lesson: Rectangles

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Teacher tools

Work it out

Not feeling ready yet? These can help:

OO.10Find the area of rectangles and squares

HH.3Find the perimeter of rectangles using formulas

F.2Multiplication facts to 10: find the missing factor

N.10Complete the addition sentence - up to two digits

Lesson: Rectangles

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