This set of material represents three cases of the Theorem of Pythagoras. In the first, 2 sides of the triangle are equal; in the second, the sides of the triangle are in the proportion of 3: 4: 5; and in the third, the general case (the Euclidean demonstration) is shown.
The material consists of 3 green metal plates with bottoms and blue, red, yellow and white inset pieces.
