Opposite and adjacent sides.
Two sides adjacent to a right angle.
Adjacent means next to. So you're asking what sides of a triangle are next to the right angle of a triangle. That would be the 2 shorter sides of the triangle or 'legs' of the triangle. The hypotenuse (which is the longest side of the triangle) is directly across from the right angle.
Those are the triangle's "legs".
That's the cosine of the angle to which the 'adjacent' side is adjacent.
They are: opposite, adjacent and hypotenuse sides for a right angle triangle
A right angle triangle has an hypotenuse which is its longest side, an adjacent side and an opposite side.
Given the reference perspective of a specific angle the sides are are the adjacent sides and the opposite side If we have a right triangle the longest side (opposite the right angle) is the hypotenuse.
Sometimes as in a square, rectangle or a right angle triangle
They are the adjacent and the opposite sides with the hypotenuse being the longest side
For any angle in the triangle that is not a right angle, the opposite side is the side does not touch the angle and the adjacent side touches it and is perpendicular to the opposite side. The third side is the longest side and is the hypotenuse
It could be a right angle triangle