# Constructive Triangles - Rectangular Box

From Montessori Album

Constructive Triangles - Rectangular Box | |
---|---|

Sensorial - Visual Discrimination of Form | |

Level | Primary |

Age | 4 + |

Prerequisites | Geometric Cabinet Constructive Triangles - Triangular Box |

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

## Contents

## Presentation[edit]

- Invite the child to the lesson. Name the work and show them where it is on the shelf.
- Unroll a large mat (or put two smaller mats side by side).
- Take the box of triangles to the mat.
- Lay the triangles so that the ones that go together are in columns.
- Slide down the bottom triangle for the first shape.
- Trace over the black line on it with your index and middle fingers.
- Trace the black line on the corresponding triangle.
- Slide down the second triangle so the black lines meet.
- Do the same with the other shapes.

## Points of Interest[edit]

## Control of Error[edit]

The black lines serve as a control of error when constructing the shapes.

## Variations and Extensions[edit]

## Material[edit]

### Make Your Own[edit]

Printable Constructive Triangles available from Livable Learning.

### Where to Buy[edit]

**All 5 Constructive Triangle Boxes**

Adena $69.96

Adena $41.39 (only 3 constructive triangle boxes)

Albanesi $505.00

Alison's $150.00

Best Montessori Toys $50.48

Bruins $274.00

Cabdev $285.00

Caliber $77.99

Creative Learning $79.95

E & O $290.00

Hello Wood $289.00

Juliana Group $470.40

Kid Advance $69.99

Montessori Land $99.00

Montessori N' Such $185.00

Montessori Outlet $72.95

Thinkamajigs $119.95

Meroco Montessori $23 (Constructive Triangles In Five Boxes)