Which side of a right triangle is the longest?

In a right triangle, the longest side is always the hypotenuse. The hypotenuse is defined as the side opposite the right angle and acts as the longest edge of the triangle. This relationship is fundamental to the properties of right triangles and is a key concept in trigonometry.

The lengths of the other two sides, typically referred to as the adjacent side and the opposite side in relation to one of the non-right angles, will always be shorter than the hypotenuse. The hypotenuse can be determined using the Pythagorean theorem, which states that the square of the hypotenuse is equal to the sum of the squares of the other two sides. This clearly illustrates that the hypotenuse must be the longest side in any right triangle configuration.

Therefore, recognizing the definition and properties of the hypotenuse is essential for understanding the basic principles of right triangles, especially in practical applications such as electrical line work, where understanding angles and distances is crucial.