DE237509C - - Google Patents

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Publication number
DE237509C
DE237509C DENDAT237509D DE237509DA DE237509C DE 237509 C DE237509 C DE 237509C DE NDAT237509 D DENDAT237509 D DE NDAT237509D DE 237509D A DE237509D A DE 237509DA DE 237509 C DE237509 C DE 237509C
Authority
DE
Germany
Prior art keywords
teaching aid
triangle
circular
roll
strips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT237509D
Other languages
German (de)
English (en)
Publication of DE237509C publication Critical patent/DE237509C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
    • G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Geometry (AREA)
  • Business, Economics & Management (AREA)
  • Algebra (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
DENDAT237509D Active DE237509C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE237509C true DE237509C (enrdf_load_stackoverflow)

Family

ID=497110

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT237509D Active DE237509C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE237509C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009829B (de) * 1952-05-02 1957-06-06 Karl Jaeger Modell zur Veranschaulichung der Inhaltsformel des Kreises

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1009829B (de) * 1952-05-02 1957-06-06 Karl Jaeger Modell zur Veranschaulichung der Inhaltsformel des Kreises

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