A student used an angle ruler to measure angles of a polygon during a class investigation |

Students have been
working on a variety of concepts throughout this unit. Here's a brief
summary:

- How to sort polygons into classes according to the number, size, and relationship of their sides and angles
- How to find angle measures by estimation, by use of tools like protractors and angle rulers, and by reasoning with variables and equations
- Discovering formulas for finding the angle sum of polygons
- The relationships of complementary and supplementary pairs of angles, and in figures where parallel lines are cut by transversals
- How to apply angle-side measurement conditions needed for drawing triangles and quadrilaterals with specific properties
- The tiling and rigidity or flexibility properties of polygons that make them useful in buildings, tools, art and craft designs and natural objects

HERE ARE SOME PICS OF THE ACTION!

As students investigated the concept, they traced the shapes and had to provide written explanations to accompany their diagram about why some polygons would tessellate and some would not. |