Resources tagged with Pinboard/geoboard similar to Pinned Squares:
Other tags that relate to Pinned Squares
smartphone. Formulae. Squares. Generalising. Mathematical reasoning & proof. Visualising. Small software. Patterned numbers. Pinboard/geoboard. Creating expressions/formulae.There are 7 results
Broad Topics > Mathematics Tools > Pinboard/geoboard
Pinned Squares
Stage: 3 Challenge Level: 
The diagram shows a 5 by 5 geoboard with 25 pins set out in a square array. Squares are made by stretching rubber bands round specific pins. What is the total number of squares that can be made on a. . . .
Threesomes
Stage: 3 Challenge Level:
Imagine an infinitely large sheet of square dotty paper on which you can draw triangles of any size you wish (providing each vertex is on a dot). What areas is it/is it not possible to draw?
Pick's Theorem
Stage: 3 Challenge Level:
Polygons drawn on square dotty paper have dots on their perimeter (p) and often internal (i) ones as well. Find a relationship between p, i and the area of the polygons.
Right Angles
Stage: 3 Challenge Level:
Can you make a right-angled triangle on this peg-board by joining up three points round the edge?
Triangles in Circles
Stage: 3 Challenge Level:
Can you find triangles on a 9-point circle? Can you work out their angles?
Subtended Angles
Stage: 3 Challenge Level:
What is the relationship between the angle at the centre and the angles at the circumference, for angles which stand on the same arc? Can you prove it?
Elastic Maths
Stage: 4 and 5
How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.
NRICH is part of the family of activities in the Millennium Mathematics Project.