Lesson 1 of 19
In Progress
Box One – Rectangle Box – Contents
MATERIALS
- Four right angled Isosceles Triangles:
- Two green triangles with black lines on the hypotenuse. They form a square.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_One-1024x303.png)
- Two yellow triangles with black lines on equal sides which inscribe the right angle. They form a parallelogram.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Two-1024x252.png)
- Six right angled Scalene Triangles:
- Two grey triangles with black lines on the hypotenuse. They form a rectangle.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Three-1024x388.png)
- Two green triangles with black lines on the longer of the two sides, which inscribe the right angle. They form a parallelogram.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Four-1024x328.png)
- Two yellow ones with black lines on the shortest of the two sides which inscribe the right angle. They form an oblique parallelogram.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Five-1024x152.png)
- Two yellow equilateral triangles with a black line painted on one side. They form a rhombus.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Six-1024x463.png)
- One red obtuse angled isosceles triangle with a black line on the hypotenuse. One red right angled scalene triangle with a black line on the longer of the two sides which inscribe the right angle. Together they form a trapezoid.
![](http://www.schoolofmontessori.com/wp-content/uploads/2021/12/Triangle-Graphics_BoxOne_Graphic_Seven-1024x146.png)