From mschoene@math.rwth-aachen.de Sun Feb 12 19:07:52 1995 Return-Path: Received: from samson.math.rwth-aachen.de by life.ai.mit.edu (4.1/AI-4.10) for /com/archive/cube-lovers id AA07555; Sun, 12 Feb 95 19:07:52 EST Received: from hobbes.math.rwth-aachen.de by samson.math.rwth-aachen.de with smtp (Smail3.1.28.1 #11) id m0rdoHv-000MPEC; Mon, 13 Feb 95 01:05 MET Received: by hobbes.math.rwth-aachen.de (Smail3.1.28.1 #19) id m0rdoHu-00025cC; Mon, 13 Feb 95 01:05 WET Message-Id: Date: Mon, 13 Feb 95 01:05 WET From: "Martin Schoenert" To: cube-lovers@life.ai.mit.edu In-Reply-To: Mark Longridge's message of Thu, 9 Feb 1995 23:55:00 -0500 <60.1035.5834.0C1CF175@canrem.com> Subject: Re: The Pyraminx Lost I have never seen the Pyraminx. I wonder if somebody could tell me whether the picture I put together from the various comments made about the Pyraminx is correct? I am fairly certain that the Pyraminx is a regular tetrahedron. In the solved state each of the four faces shows only one of the four colours. I think the Pyraminx is cut along 8 planes, two planes perpendicular to each of the four heights (i.e., the four lines that connect a corner with the center of the opposite face). I think for the Pyraminx those planes intersect the height at about 2/5 and 3/5 of the length of the height. Those planes cut the Pyraminx into 15 pieces (1 central piece, 4 corners, 4 inner pieces, and 6 edes), which are all visible. Each face is cut into 10 facelets by them as follows. + / \ / \ / \ / \ / \ +-----------+ / \ / \ / \ / \ +-----+-----+-----+ / \ \ / / \ / \ \ / / \ / \ + / \ / \ / \ / \ / \ / \ / \ +-----------+-----+-----------+ The Pyraminx Star was descibred as a Pyraminx without the centers. So I guess each face of the Pyraminx Star looks as follows. + / \ / \ / \ / \ +---------+ / \ / \ / \ / \ / \ / \ / \ / \ +---------*---------+ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ / \ +---------+---------+---------+ The Pyraminx Snub was described as a Pyraminx without the tips. So I guess each face of the Pyraminx Snub looks as follows. +-----------+ / \ / \ / \ / \ +-----+-----+-----+ \ \ / / \ \ / / \ + / \ / \ / \ / \ / +-----+ I have no idea what Pyraminx Senior and the Pyraminx Master look like. Have a nice day. Martin. -- .- .-. - .. -. .-.. --- ...- . ... .- -. -. .. -.- .- Martin Sch"onert, Martin.Schoenert@Math.RWTH-Aachen.DE, +49 241 804551 Lehrstuhl D f"ur Mathematik, Templergraben 64, RWTH, 52056 Aachen, Germany