Connecting GeoStix™ allow students to delve into plane geometry. Great for hands-on activities such as perimeter, area, identification of shapes, spatial reasoning, similar triangles that share a side, parallel lines cut by a transversal, show examples of angle bisectors that form perpendicular angles to opposite sides and more. Includes 80 plastic GeoStix® in 8 different color coded lengths (1" to 6"), 2 protractors, and a set of 24 double-sided activity cards with 23 activities. Cards include teacher-lead activities that align with educational standards. Sizes range 1" - 6"L.