Definition:Dual Elements/Plane Geometry

Definition

In the context of plane geometry, dual elements are:

straight lines, which can be defined by two points

points, which can be defined by the intersection of two straight lines.

Also see

• Definition:Dual Elements in Solid Geometry

• Definition:Plane Geometric Duality
• Definition:Solid Geometric Duality

• Definition:Dual Operations
• Definition:Dual Statements
• Principle of Duality

• Results about dual elements can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): duality: 1.
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): duality: 1.