Definition:Opposite

Disambiguation

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Opposite may refer to:

• Opposite (in a Polygon):
  • The opposite side (or angle) to a given side is that side (or angle) which has the same number of sides between it and the side in question.
  • The opposite side (or angle) to a given angle is that side (or angle) which has the same number of sides between it and the angle in question.

• Opposite (in a Triangle): The side of a triangle which is not one of the sides adjacent to a particular angle is referred to as its opposite. Thus, each angle has an opposite side, and each side has an opposite angle.

• The Opposite Group to a group $\left({G, \circ}\right)$ is the group $\left({G, *}\right)$ defined such that $\forall a, b \in G: a \circ b = b * a$.