Constructive Triangles - Triangular Box

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Constructive Triangles - Triangular Box
Sensorial - Visual Discrimination of Form
Triangle Box 13.JPG
Age4 +
PrerequisitesGeometric Cabinet
Constructive Triangles - Rectangular Box
MaterialsTriangular Box of Constructive Triangles

Use of this material makes the child aware that all polygons can be made with triangles. This activity prepares the child for geometry.


  1. Take the box to a mat, place it in the upper right-hand corner with the lid underneath.
    Triangle Box 1.JPG
  2. Remove the triangles one at a time and place them randomly on the upper part of the mat.
    Triangle Box 2.JPG
  3. next step
    Triangle Box 3.JPG
  4. next step
    Triangle Box 4.JPG Triangle Box 5.JPG
  5. next step
    Triangle Box 6.JPG Triangle Box 7.JPG
  6. next step
    Triangle Box 8.JPG
  7. next step
    Triangle Box 9.JPG
  8. next step
    Triangle Box 10.JPG
  9. next step
    Triangle Box 11.JPG
  10. next step
    Triangle Box 12.JPG
  11. next step
    Triangle Box 13.JPG
  12. next step
    Triangle Box 14.JPG
  13. next step
    Triangle Box 15.JPG Triangle Box 16.JPG Triangle Box 17.JPG

Points of Interest

Control of Error

Variations and Extensions


Make Your Own

Printable version available to buy here:

Where to Buy

Prices and links last checked: 1 June 2020

Set of 5 Constructive Triangle Boxes
(Includes: Rectangular Box, Triangular Box, Blue Rectangular Box, Large Hexagonal Box, Small Hexagonal Box)
Adena $88.95
Alison's $157.60
Bruins $290.00
E & O $145.00
Hello Wood $328.00
Kid Advance $89.99
Leader Joy $99.95
Materials Company of Boston $230.00
Montessori N' Such $80.00
Montessori Outlet $98.95
Neinhuis $299.00
Thinkamajigs $101.96

Blue Triangles Box
Adena $18.69
Alison's $38.25
Bruin's $45.00
E & O $24.00
Hello Wood $53.00
Kid Advance $18.99
Leader Joy $20.95
Materials Company of Boston $31.00
Montessori N' Such $15.01
Montessori Outlet $18.95
Nienhuis $59.60
Thinkamajigs $15.26