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Pythagoras Basics 3

A self marking exercise on the application of Pythagoras' Theorem.

Level 1 Level 2 Level 3 Level 4 Level 5 Description Help More on Pythagoras

Calculate the length of the third side of these right angled triangles. The diagrams are not to scale. Give your answer correct to 1 decimal place.

6.9cm

9.3cm

cm Correct Wrong

9.6cm

13.5cm

cm Correct Wrong

9.2cm

11.8cm

cm Correct Wrong

6.4cm

9.1cm

cm Correct Wrong

6.7cm

11.1cm

cm Correct Wrong

9.6cm

12.2cm

cm Correct Wrong

6.9cm

11.3cm

cm Correct Wrong

7.1cm

11.6cm

cm Correct Wrong

8.5cm

12.6cm

cm Correct Wrong

7.7cm

11.2cm

cm Correct Wrong

7.3cm

7.8cm

cm Correct Wrong

9.3cm

9.1cm

cm Correct Wrong
Check

This is Pythagoras Basics 3 level 3. You can also try:
Level 1 Level 2 Level 4 Level 5

Instructions

Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

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An opportunity for students to write a computer program. There is nothing to download, all of the interaction takes place in the browser. Great for understanding angles and the properties of shapes.

Answers

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Description of Levels

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Level 1 - Finding the hypotenuse

Level 2 - Finding a shorter side

Level 3 - Mixed questions

Level 4 - Pythagoras Theorem quiz

Level 5 - Three dimensional Pythagoras and Trigonometry

Pythagoras' Theorem

To find the longest side (hypotenuse) of a right-angled triangle you square the two shorter sides, add together the results and then find the square root of this total.

To find a shorter side of a right-angled triangle you subtract the square of the other shorter side from the square of the hypotenuse and then find the square root of the answer.

Example

Pythagoras Example

AB2 = AC2 - BC2
AB2 = 4.72 - 4.12
AB2 = 22.09 - 16.81
AB2 = 5.28
AB = √5.28
AB = 2.3m (to one decimal place)

Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly.

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