Geoboard
![A wooden 3 × 3 geoboard](/Images/godic/202501/15/Geoboard5310.JPG")
![A plastic 5 × 5 geoboard](/Images/godic/202501/15/25_peg_geoboard5310.JPG")
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. rubber bands can also be used.