First of all, you have to make sure that it's a RIGHT triangle. That means that one
of the angles in the triangle is 90 degrees. If not, then it's not a right triangle, and
it doesn't have a hypotenuse.
If it IS a right triangle, then the longest side is the hypotenuse.
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If it has no right angles, it is not a right triangle and therefore you cannot name a hypotenuse of that triangle. Which implies you cannot find that side's measure.
The same way that you find the hypotenuse in the case of integers or decimals. If a triangle has a right triangle, use Pythagoras' Theorem.
Adjacent side / Hypotenuse
A right triangle with legs of 7 and 11 units has a hypotenuse of: 13.04 units.
Find the length of the hypotenuse of a right triangle whose legs are 8 and 15 units in length.