ERIC Number: EJ886046
Record Type: Journal
Publication Date: 2010-May
Abstractor: As Provided
Reference Count: 0
When Are Two Sets Congruent?
College Mathematics Journal, v41 n3 p193-196 May 2010
The title question has at least two natural answers, one "global" and one "local." Global: "when they can be made to coincide by a rigid motion of the whole plane;" local: "when there is a one-to-one distance preserving mapping of one onto the other." Self-evidently global implies local. We show that in fact these different notions lead to precisely the same notion of congruence.
Descriptors: College Mathematics, Mathematics Instruction, Problem Solving, Mathematical Concepts, Teaching Methods
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Authoring Institution: N/A