In a right triangle, what is the longest side called?

• A. Adjacent side
• B. $\mathrm{Hypotenuse}$
• C. Median
• D. Opposite side

Answer: (B)

Verified step by step guidance

1. Recall that in a right triangle, the side opposite the right angle is the longest side.
2. This longest side is called the hypotenuse.
3. The other two sides are called the legs, which can be referred to as the adjacent side and the opposite side depending on the angle of reference.
4. The hypotenuse is always opposite the right angle and is longer than either leg.
5. Therefore, the longest side in a right triangle is the hypotenuse.