To show the various triangles contained in an equilateral triangle.
To discriminate geometric forms.
To develop growth in concentration and independence.
Age:
4 years old.
Material
A triangular box of constructive triangles which contains:
One equilateral triangle painted gray and having no black lines.
Two green scalene right triangles, which have a black line on the longer of the two sides which inscribe the right angle. When these black lines are mapped, the triangles form an equilateral triangle equal to the gray triangle.
Three isosceles obtuse triangles painted yellow and having black lines on the two equal sides which inscribe the obtuse angle. When these black lines are mapped the three triangles form an equilateral triangle equal to the gray triangle.
Four red equilateral triangles, one of which has black lines on all three sides and three which have black lines on one sides. When these black lines are mapped, the four triangles form an equilateral triangle equal to the gray triangle.
