Students will discover what happens as they use the same length legs versus different length legs to build various polygons, as they attach additional legs they study polygon heights, calculate their areas, find center points and much more! When two AngLegs™ of any length are snapped onto the special 4" protractor students will explore angles, add a third leg for triangles, a forth for quadrilaterals, and so on. This 74-piece set consists of 72 AngLegs™ 12 each of six different lengths in six colors, two snap-on View Thru TM protractors, a set of 15 activity cards, divided into three sections for grades K-2, 3-5 and 6-8. All activities adhere to the NCTM Standards for geometry.