Extend young mathematicians' understanding of area with a geometry lesson on trapezoids. Building on their prior knowledge of rectangles and triangles, students learn how to calculate the area of trapezoids and other...

Circles are the foundation of many geometric concepts and extensions - a point that is thoroughly driven home in this extensive unit. Fundamental properties of circles are investigated (including sector area, angle measure, and...

Trace the links between a variety of math concepts in this far-reaching unit. Ideas that seem very different on the outset (like the distance formula and rigid transformations) come together in very natural and logical ways. This...

[Free Registration/Login may be required to access all resource tools.] Identify regular polygons and their characteristics

[Free Registration/Login may be required to access all resource tools.] Identifying polygons, their diagonals and their angles

Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!

Mattie and her four sisters are visiting a toy store. Can you help them find different shapes in the toy store?