Which of the following instruments is unnecessary to draw a right triangle with all 3 sides given?

Ruler

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Protractor

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Set Square

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Options 2 or 3

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Solution

The correct option is D
Options 2 or 3

To draw a right triangle with all 3 sides known, a ruler and protractor can be used together or a ruler and set square can be used together. The protractor and set square can both be used to draw a right angle. Either one of these 2 is enough. Both are not necessary.

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