Area of a quadrilateral is when you calculate Length X Width

length

wid

thArea = length x width

Now work out the area of these rectangles.

They are not drawn to scale.

36cm235cm2

20cm2

4cm

9cm

7cm

5cm

5cm

4cm

What happens if you have the area and

the measurement of one side…..how do you find the other

side????

What we know… What we know…

AREA = LENGTH X WIDTHAREA = LENGTH X WIDTH

What is missing… What is missing…

AREA = AREA = X X WIDTHWIDTH

or…or…

AREA = LENGTH X AREA = LENGTH X

3 cm.12 cm²

?

?24 in²

6in.

What do you need to do to find What do you need to do to find the answer…the answer…

AREA LENGTH WIDTHAREA LENGTH WIDTH==÷÷ XX== OROR

……

AREA WIDTH LENGTHAREA WIDTH LENGTH÷÷ ==

9 in.

45 in.² ?

Open Number Sentence

45 ÷ 9 = W

Solution

45 ÷ 9 = 5 in.

6 in.

48 in.²

?

Open Number Sentence

48 ÷ 6 = L

Solution

48 ÷ 6 = 8 in.