Wednesday, May 18, 2022

Geoboard: - Google Play

 


 

A geoboard is a mathematical manipulative used to explore basic concepts in plane geometry such as perimeter, area and the characteristics of triangles and other polygons. It consists of a physical board with a certain number of nails half driven in, around which are wrapped geo bands that are made of rubber. Normal rubber bands can also be used.

Geoboards were invented and popularized in the 1950s by Egyptian mathematician Caleb Gattegno (1911-1988).

 In my geoboard you can build all kinds of polygons and try to guess the surface they contain.

 Promotional Video:


 
 
 
Some examples: 

All polygons area = 2 under a 4*4 grid:
 


Squares area= 1, 2, 5, 10
 

 
 Pythagoras:  1, 4, 5


Farey Sunburst:
(Farey Sequence: 6)
Area = 48

 

 
 

Buttons in the app:

Buttons:
0=0   Insert new rubber band
T       Erase rubber band
Col   Change rubber band color
A      Calculate area

 

Geoboard:  Privacy Policy:

https://nummolt.blogspot.com/2022/05/privacy-policy-geoboard.html

 

 

 

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