Mary Koerber Geometry in two dimensional and three dimensional ...

Closing Activity:Have students try do draw their own net that has to fold to form a three dimensionalfigure.Have students use the Euler’s Formula they came up with to make sure it works withtheir figure.Students should have various figures and notice that Euler’s formula works for all ofthem.Opening ActivityEuler’s FormulaSpace figures and Nets:Review:Most buildings are polyhedrons. A polyhedron is a three dimensional figure whosesurfaces are polygons. The Polygons are the faces of the polyhedron. An edge is asegment that is the intersection of two faces. A vertex is a point where edges intersect.A net is a two dimensional pattern that you can fold to form a three dimensional figure.Packagers use nets to design boxes.Have Students work in groups of four.Pass out opening activity ditto to students. Have students cut the nets out of the ditto tomake three dimensional models.Ask students if the nets can look different to make the three dimensional shape.Koeber – Page 26