Pythagoras Problems
Pythag offers simple to use, on line tools to find the length of one side of a right angled triangle if you know the lengths of the other two sides. There are two possible cases and a separate tool for each. Open up the tool(s) you require and type in the known lengths to get your solutions. Just to keep your teacher happy, as well as an answer, the tools produce a line of working.

Finding the Hypotenuse This tool calculates the hypotenuse if you know the other sides. It rounds the answer according to your wishes and shows how the answer was found with a line of working.

Finding a Short Side This tool calculates the length of one short side if you know the other short side and the hypotenuse. It rounds the answer according to your wishes and shows how the answer was found with a line of working.

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tool 1 - tool 2 - proof - contact