Definition:Opposite Vertices of Symmetric Figure
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Definition
Let $F$ be a geometric figure with a center of symmetry $S$.
Two sides of $F$ are opposite if and only if they are joined by a straight line through the center of symmetry of $F$.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): opposite: 2.
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): opposite: 3.