A set of 10 different Length flexible sticks that snap together at different points allowing students to investigate planar geometry. Activities include principles of angles: definitions and properties, angles in a semicircle, angles in a polygon and angles in a cyclic quadrilateral; Polygons: naming, regular, irregular and diagonals; geometry: lines of Symmetry and parts of Circles (radius, diameter, chord, sector). the set includes 100 flexible plastic sticks, 2 protractors (measuring 4 inch each. An ideal hands-on manipulative for students to Explore geometric concepts. Geostix sizes range from 2.5cm to 15 cm and includes 90° R7.07cm and 180° R7.07cm pieces. Packaged with 16 double-sided activity cards in plastic storage container.