In a right triangle, the longest side ... the one opposite the right angle ... is the hypotenuse. The other two sides are called "legs".
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The hypotenuse will always be longer than the other sides.
It is the largest side
adjacent, opposite and hypotenuse
A right triangle, by definition, has a right (or 90o) angle. The side that is opposite that right angle is the hypotenuse. That is to say, the other two sides, which are not the hypotenuse, are the two sides which meet at a right angle.
The two sides are called base and height and the sloping part of the right angle triangle is called the hypotenuse.