This calculator will use the Pythagorean Theorem to solve for the missing length of a right triangle given the lengths of the other two sides.

Plus, unlike other online calculators, this calculator will show its work and draw the shape of the right triangle based on the results.

Finally, the **Learn** tab also includes a mini calculator that checks to see if the given lengths of three sides of a triangle form a right triangle (Converse of Pythagorean Theorem).

If you are unfamiliar with the Pythagorean Theorem, it may help to visit the **Learn** tab before using the calculator.

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