Answer:
The hypotenuse of a right triangle is the largest side of the triangle. In triangle ABC, the hypotenuse is AB because it has the greatest length.
The adjacent side of an angle is the side that is closer to the angle, it forms the angle with the hypotenuse. For example, the adjacent side of angle A is AC because it is closer to angle A.
The opposite side is the side that is across to the angle, in this canse, the opposite side of angle A is BC.