Mathematical instruction board and method of use

Details Mathematical instruction board and method of use Mathematical instruction board and method of use

1992-01-27

1993-06-01

Wilson, John J.

Education and demonstration

Mathematics

Geometry, trigonometry, or physical mathematic model structure

434211, 434216, G09B 2304

Patent

active

052154670

ABSTRACT:
An educational board for use in demonstrating mathematical principles has a surface marked with a circle having its circumference marked with gradations indicating 360 degrees. The board is provided with pins to mark any angular displacement along the circumference and connecting elastic bands which are stretched around the pins to create shapes inscribed in the circle.

REFERENCES:
patent: 3191318 (1965-06-01), Hoffmann
patent: 3382591 (1968-05-01), Savin et al.
patent: 3461573 (1969-08-01), Stibal
patent: 3702505 (1972-11-01), Hadjigeorghiou
patent: 3797134 (1974-03-01), Wingerd

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