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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

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Peer reviewed Peer reviewed
ERIC Number: EJ086885
Record Type: CIJE
Publication Date: 1973
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
Urquhart's Quadrilateral Theorem
Grossman, Howard
Mathematics Teacher, 66, 7, 643-644, Nov 73
Descriptors: Geometric Concepts, Mathematical Concepts, Mathematical Enrichment, Mathematics, Mathematics Education, Secondary School Mathematics
Publication Type: N/A
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Proof (Mathematics)