# Unit 1 Section 3 : Using a Flow Chart for Classification

A flow chart can be used to sort things into categories. This process is called classification.

## Example Question 1

The flow chart below can be used to classify quadrilaterals (four-sided shapes).
If you follow the flow chart for a particular quadrilateral, it will tell you the shape's special name (if it has one).

Look at each quadrilateral on the right. Use the flow chart to find the shape's special name (if it has one).
When you have worked out the answer, click on the button marked to see whether you are correct.

 (a) (b) (c) (d) (e) (f)

## Example Question 2

The flow chart below can be used to classify angles.
The names of each type of angle have been left off the bottom of the flowchart.

 The five types of angle below need to be placed in the five boxes at the bottom of the flowchart. Work out which type of angle goes in each box, and then click the button marked to see whether you are correct. The angle types are: Acute angles Angles on a straight line Obtuse angles Reflex angles Right angles You may need to look up some of these angle types if you are not sure what they mean.

## 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
The flow chart below is the one for classifying quadrilaterals from Example 1.

 Use the flow chart to classify the quadrilaterals on the right. Square Rectangle Rhombus Parallelogram Trapezium Not special Square Rectangle Rhombus Parallelogram Trapezium Not special Square Rectangle Rhombus Parallelogram Trapezium Not special Square Rectangle Rhombus Parallelogram Trapezium Not special Square Rectangle Rhombus Parallelogram Trapezium Not special Square Rectangle Rhombus Parallelogram Trapezium Not special

Question 2
The flow chart below will be used to sort triangles according to whether they are equilateral, isosceles or scalene. The three empty boxes on the flowchart need to be filled in using the outcome boxes on the right.

You will need to place the outcome boxes below into the flow chart.

To copy an outcome into a space, first click on the outcome, then click the space where you want it to go. An arrow will show the currently selected outcome. To clear a space again, make sure no outcome is selected, and then click that space.

Question 3
The flow chart below can be used to sort animals into categories.

Where would each of the animals
below come out of the flow chart?
 (a) Monkey A B C D E F (b) Bird A B C D E F (c) Giraffe A B C D E F (d) Horse A B C D E F (e) Centipede A B C D E F (f) Elephant A B C D E F (g) Zebra A B C D E F (h) Pig A B C D E F (i) Kangaroo A B C D E F (j) Fish A B C D E F (k) Dolphin A B C D E F (l) Cat A B C D E F

Question 4
The flow chart below can be used to sort numbers into two categories.

Where would each of the numbers
below come out of the flow chart?
 (a) 1 A B (b) 2 A B (c) 3 A B (d) 4 A B (e) 5 A B (f) 6 A B (g) 7 A B (h) 8 A B (i) 9 A B (j) 10 A B What do you notice about all the numbers which end up at A? They are all even numbers odd numbers prime numbers square numbers

Question 5
The flow chart below will be used to sort numbers according to whether they are even or odd. The four empty boxes on the flowchart need to be filled in using the outcome boxes on the right.

You will need to place the outcome boxes below into the flow chart.

To copy an outcome into a space, first click on the outcome, then click the space where you want it to go. An arrow will show the currently selected outcome. To clear a space again, make sure no outcome is selected, and then click that space.

You have now completed Unit 1 Section 3
 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 2003
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