In fact if we know the lengths for any two sides leg A leg B and hypotenuse C we can easily figure out the missing side by applying the formula. The Hypotenuse of a Triangle Formula. Basically the hypotenuse is the property of only the right triangle and no other triangle.
Learn the Pythagorean Theorem.
Pythagoras theorem can also be used to find the length of another side of a triangle using the hypotenuse. The method below is known as the pythagorean theorem. Use sine cosine or tangent to find x in the triangle below. For example suppose you know a 4 b 8 and we want to find the length of the hypotenuse c.