Geometric Model by A. Harry Wheeler, Supplementary Trihedral Angles
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Harry Wheeler, Supplementary Trihedral Angles"}, "metadata_usage": {"access": "CC0"}, "data_source": "National Museum of American History"}, "indexedStructured": {"date": ["1920s"], "geoLocation": [{"Other": {"type": "Place", "content": "United States"}}, {"Other": {"type": "Place", "content": "Massachusetts"}}, {"Other": {"type": "Place", "content": "Worcester"}}, {"points": {"point": {"latitude": {"type": "decimal", "content": "42.25"}, "longitude": {"type": "decimal", "content": "-71.8"}}}}], "object_type": ["Models"], "name": ["Wheeler, Albert Harry"], "topic": ["Spherical Trigonometry", "Science", "Mathematics", "Trigonometry"], "place": ["United States", "Worcester", "Massachusetts"], "online_media_type": ["Images"]}, "freetext": {"setName": [{"label": "See more items in", "content": "Medicine and Science: Mathematics"}, {"label": "See more items in", "content": "Trigonometry"}, {"label": "See more items in", "content": "Science & Mathematics"}, {"label": "See more items in", "content": "Spherical Trigonometry"}], "date": [{"label": "date made", "content": "1927 05 29"}], "identifier": [{"label": "ID Number", "content": "MA.304723.195"}, {"label": "accession number", "content": "304723"}, {"label": "catalog number", "content": "304723.195"}], "notes": [{"label": "Description", "content": "Three planes that meet at the center of a sphere form what is called a trihedral (three-sided) angle. Each plane intersects the sphere in a great circle. Segments of these three circles form a spherical triangle on the sphere. In this cut and folded tan paper model, Wheeler labels the vertices of this triangle ABC. Consider a point (not named by Wheeler \u00e2\u0080\u0093 call it X) inside the bounds of the trihedral angle and drop perpendiculars to the three sides of the trihedral angle through it. Wheeler calls the points of intersection D, E, and F. The trihedral angle centered at X is the supplement of the original trihedral angle."}, {"label": "Description", "content": "Reference:"}, {"label": "Description", "content": "D. A. Low, <I>Practical Geometry and Graphics</I>, New York: Longmans, Green and Co., 1912, pp. 233-235."}, {"label": "Location", "content": "Currently not on view"}], "creditLine": [{"label": "Credit Line", "content": "Gift of Helen M. Wheeler"}], "name": [{"label": "maker", "content": "Wheeler, Albert Harry"}], "topic": [{"label": "subject", "content": "Mathematics"}], "place": [{"label": "place made", "content": "United States: Massachusetts, Worcester"}], "physicalDescription": [{"label": "Physical Description", "content": "paper (overall material)"}, {"label": "Physical Description", "content": "tan (overall color)"}, {"label": "Physical Description", "content": "cut and folded (overall production method/technique)"}, {"label": "Measurements", "content": "average spatial: 7 cm x 7.3 cm x 6 cm; 2 3/4 in x 2 7/8 in x 2 3/8 in"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "Geometric Model"}]}}, "url": "edanmdm:nmah_1066700", "hash": "15d89b070072b018dbe1d957ea0233df8dfe6a9d", "docSignature": "61c1457ce1530cdb7f8fc865dc4060d6", "timestamp": 1663781938, "lastTimeUpdated": 1655973454, "title": "Geometric Model by A. Harry Wheeler, Supplementary Trihedral Angles"}