Geometry

Geometry [|When is a triangle just a building block.doc] problem solving task [|Paper Folding Icosahedron lesson outline.docx] an opportunity to talk about how 2D shapes link to 3D shapes revise as you fold. media type="custom" key="4080787"Watch the clip to see how to make the truncated tetrahedron - make 20 to make the icosohedran