A set of material illustrating three cases of the Pythagorean theorem.
In the first, the two sides of the triangle are equal; in the second, the sides of the triangle are in the ratio 3:4:5;
the third is the general case (the Euclidean demonstration).
The material consists of three green metal plates with bases and pieces with grip knobs.
1st metal plate 20 cm / 20 cm
2nd metal plate 35 cm / 20 cm
3rd plate 42 cm / 20 cm.