Rotating pie graph: mathematics learning tool

Details Rotating pie graph: mathematics learning tool Rotating pie graph: mathematics learning tool

1995-06-14

1998-10-20

Hirsch, Paul J.

Education and demonstration

Mathematics

Arithmetic

434188, 434198, G09B 2302

Patent

active

058237836

ABSTRACT:
The present invention is directed to a system for demonstrating mathematic concepts, such as fractions and their equivalents. The system includes at least one device constituted by a pie chart sheet having a slot, and a rotating disk having a slit. The slit in the rotating disk provides a leading edge which is inserted through the slit on the chart page to allow the rotating disk to cover any selected portion of the chart. Because the cuts in both the pie chart on the chart sheet are radial, rotation of the disk about a common center point is facilitated.

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