Make the rule by filling in the blanks in this sentence.


If you know the area of a rectangle and you also know either the length or the width, you can work out the side you don’t know by .


the by the


7. A gardener has to cut the grass in each of the following gardens. He knows the area of each of the gardens because he planted the grass seed and he knows either the length or the width of each garden. Can you help him work out the measurement he is missing?


Garden 1 Length – ?


Width – 16m Area – 304m2


Garden 4 Length – ?


Width – 15m Area – 705m2


Garden 2


Length – 38m Width – ?


Area – 912m2 Garden 5


Length – ?


Width – 27m Area – 729m2


8. If the area of a garden is 238m2 width of the garden?


Garden 3


Length – 42m Width – ?


Area – 1512m2 Garden 6


Length – ?


Width – 30m Area – 1620m2


and the length of the garden is 17m, what is the


9. a) If the perimeter of a piece of paper is 112cm and the width of the piece of paper is 27cm, what is the area of the piece of paper?


b) If I have a second piece of paper whose perimeter is 114cm and whose length is 39cm, what is the area of the piece of paper?


c) Compare the perimeters and areas of the 2 pieces of paper. What do you notice about your answers?


194 Area 1


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