Getting in Shape: Exploring Two-Dimensional Figures

Through a series of hands-on investigations, students first explore some properties of angles and triangles, including the Triangle Inequality Theorem. Next, students analyze properties of regular polygons and develop formulas for area and sums of interior and exterior angles. They then explore circles and develop circumference and area formulas.

NCTM Standard: Geometry

NCTM Standard: Measurement

Primary Mathematical Goals