Unit 9 Section 1 : Area

The easiest method to find an area of a shape, particularly if it is a simple shape made up of straight lines, is to count the squares inside it.

Example Question 1

Look at the shapes below:

Practice Questions
Work out the area (in square units) of each of the shapes on the left then click on the button marked

to see whether you are correct.

(a)
(b)

Example Question 2

Look at the curved shape below.

Estimate the area of the shape. Some of the squares have been numbered to help you.
There are 4 complete squares (labelled 1, 2, 3 and 4). Regions 5 and 6 together make up about 1½ squares, as do regions 7 and 8. So we have another 3 squares giving a total of 7 square units (plus a little bit more!).
We often have to use this type of estimation when working with curved shapes.

Exercises

Work out the answers to the questions below and fill in the boxes. Click on the

button to find out whether you have answered correctly. If you are right then

will appear and you should move on to the next question. If

appears then your answer is wrong. Click on

to clear your original answer and have another go. If you can't work out the right answer then click on

to see the answer.

Question 1
Look at the circle below. Count squares to estimate its area.

What is the area of the circle?
The computer will allow a small amount of error.
square units

Question 2
Find the areas of these shapes by counting squares.

You have now completed Unit 9 Section 1

Your overall score for this section is

Correct Answers
You answered questions correctly out of the questions in this section.

Incorrect Answers
There were questions where you used the Tell Me button.
There were questions with wrong answers.
There were questions you didn't attempt.

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Produced by A.J.Reynolds January 2001

(a)	square units
(b)	square units
(c)	square units
(d)	square units