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A right angled triangle has three sides.

The naming of these sides is dependant on which angle you are observing.

The first side is named the opposite and is the side which is not in contact with the angle that is being observed (each angle is in contact with ONLY two sides)

The second side is the hypotenuse which is the side opposite to the right angle. Also termed the diagonal, the hypotenuse is the longest side of the triangle.

The third side, the one you are interested in, is the adjacent side which is the angle which is in contact with the angle being observed which ISN'T the hypotenuse or the opposite. It can be determined by a process of elimination in that there are two sides in contact with the observed angle.

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14y ago

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Q: What is the adjacent side of a right triangle?
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