Multifunctional mathematics educational appliance

The utility model discloses a teaching tool for helping study mathematics, comprising a frame whose middle is provided with a round hole, a transparent disc (or a ring) and an opaque disc. The overall thickness of two discs is identical with the thickness of the frame. After the two discs are superp...

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Bibliographic Details
Main Authors QIAN YIYUAN, ZHOU SI'SAN
Format Patent
LanguageEnglish
Published 16.10.1996
Edition6
Subjects
ADVERTISING
APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE
CRYPTOGRAPHY
DIAGRAMS
DISPLAY
EDUCATION
EDUCATIONAL OR DEMONSTRATION APPLIANCES
GLOBES
PHYSICS
PLANETARIA
SEALS
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Summary:The utility model discloses a teaching tool for helping study mathematics, comprising a frame whose middle is provided with a round hole, a transparent disc (or a ring) and an opaque disc. The overall thickness of two discs is identical with the thickness of the frame. After the two discs are superposed and placed in the frame, the two discs can be rotated flexibly without interference. Each part is marked with centimeter scales, or a plurality of kinds of logarithmic linear groups, or trigonometric function linear groups, or 100 or 360 equidistant lattices, or abscissa, or ordinate or mathematic symbols. Various correlations among provided conditions and the rotation of the discs are used. The utility model can be used for calculating positive and inverse trigonometric functions, logarithm, equation and rational number, drawing various geometrical figures and helping remember triangular formulas.
Bibliography:Application Number: CN1994242526U