ERIC Number: EJ856222
Record Type: Journal
Publication Date: 2008-Mar
Abstractor: As Provided
Reference Count: 0
Universal Stoppers Are Rupert
Jerrard, Richard P.; Wetzel, John E.
College Mathematics Journal, v39 n2 p90-94 Mar 2008
A stopper is called "universal" if it can be used to plug pipes whose cross-sections are a circle, a square, and an isosceles triangle, with the diameter of the circle, the side of the square, and the base and altitude of the triangle all equal. Echoing the well-known result for equal cubes that is attributed to Prince Rupert, we show that it is always possible to make a hole in such a universal stopper that is large enough to permit the passage of a second such stopper.
Descriptors: Geometric Concepts, Geometry, Mathematics Instruction, College Mathematics, Problem Solving, Mathematical Logic
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Authoring Institution: N/A