Opposite Side


Given an acute angle in a right triangle, the opposite side is the leg of the triangle which is not incident on the angle.

Lengths of opposite and adjacent sides appear together with the length of the hypotenuse in the definition of the trigonometric functions, most notably via their mnemonic SOHCAHTOA.

See also

Adjacent Side, Cathetus, Leg, SOHCAHTOA, Trigonometric Functions, Trigonometry

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Cite this as:

Weisstein, Eric W. "Opposite Side." From MathWorld--A Wolfram Web Resource.

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