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You can't do that with just any three numbers.

The squares of two of them have to add up to the square of the third one.

If that's a fact, then those three numbers can be the sides of a right triangle.

If it's not, then they can't.

If the three numbers pass the test, then it's easy to draw the right triangle.

Draw two lines with a 90-degree angle between them. Cut them off at the

lengths of the two smallest two numbers. The distance between their ends

will be exactly the third number, and the longest line will just fit.

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Q: How do you form a right triangle with 3 lengths given?
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