Geoboard
Stretch rubber bands on square, coordinate, isometric or circular geoboards, measure perimeter and area, and explore lines and slope.
Free, runs in the browser, no sign-in or installation.
- Subject
- Mathematics
- Area
- Geometry
- Level
- Primary and secondary school
What you can do
- Choose one of eight boards: square 5 × 5, 7 × 7 or 11 × 11, coordinate, Functions, isometric, or circular with 12 or 24 pegs.
- Stretch a band from peg to peg, pull a side onto another peg to add a corner, and choose one of eight colours and three thicknesses.
- Select a band to see its number of pegs, its perimeter (exact, with square roots) and its area in square units or unit triangles.
- On the Functions board a band shows the whole line, its slope triangle and equation; Equation → band and Band → equation tasks check themselves.
- Draw with the pen, undo and redo, choose a wood, black-and-white or transparent board and download the picture as a PNG.
Pictures in the Gallery7
Ready-made pictures made in this app, to download as PNG.
Worksheets and lessons
Lessons with worksheets that use this app.
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