IXL | Find the missing side length of a rectangle

The length of the rectangle is

centimeters

The area is

square centimeters

What is the width of the rectangle?

sq cm

centimeters

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Learn with an example

question

The width of the rectangle is

centimeters

The area is

square centimeters

What is the length of the rectangle?

sq cm

centimeters

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

centimeters

(

)

the area is measured in

square centimeters

(

sq cm

)

solution

You know the width is

centimeters

and the area is

square centimeters

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

?	×	9	=	45

length		width		area
(cm)		(cm)		(sq cm)

You can use a multiplication fact to find the length.

The length of the rectangle is

centimeters

Looking for more? Try these:

Lesson: Rectangles

$Confetti$

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Now entering the Challenge Zone—are you ready?

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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