Definition of hypotenuse

The hypotenuse of a right triangle is the side opposite the right angle. In the triangle below, the red line is the hypotenuse.

Hypotenuse


  • The hypotenuse of a triangle is the longest side of the triangle.

  • If the triangle has no right angle, then there is no hypotenuse. In other words no special names are given for the sides of the triangle.

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