Hypotenuse
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The hypotenuse of a right triangle is the side opposite the right angle. It is also the longest side of the triangle.
The hypotenuse can be found by using the formula
where a and b are legs of the triangle and c is the hypotenuse.
The hypotenuse is a diameter of the circumcircle. It follows that the midpoint of the hypotenuse of the triangle is the center of the circle. The converse also holds: if the length of the median of 
from 
is the same as 
, then is a right triangle with its right angle at .
See also
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