b'MathematicsMetal Squares: 9 PlatesThis material is used for geometry, specifically exercises of equivalent, identical and similar figures. The set consists of 9 green metal frames with bottoms, 1 set of insets divided into squares and rectangles and 1 set of insets divided into triangles (this material is also used for small metal inset work, linear geometric design.).Item Number: 011500$449.95Metal Triangles: 4 PlatesThe Metal Triangles material allows the child to make an analytical study of triangles. The set consists of 4 metal frames with bottoms. The insets are equilateral triangles divided into 1, 1/2, 1/3 and 1/4.Item Number: 011600$199.95 Inscribed And Concentric Figures: MetalThis material is used for the study of inscribed and concentric figures. The material consists of 9 green metal frames with bottoms and red insets with 1 set of 5 circles decreasing in diameter and 1 set of 4 squares decreasing in length and width.Item Number: 011800$259.95Small Triangle Small Trapezoid Small Quatrefoil Triangle Inscribed In CircleItem Number: 011700 Item Number: 0117A0 Item Number: 0117B0Item Number: 011900$69.95 $64.95 $54.95 $51.95Nienhuis Montessori 89'