Nets of Solids or Convex Polyhedrons Section 6.2

Learning Goal We will use our knowledge of the characteristics of solids so that we can match a convex polyhedron to its net. We’ll know we’ve got it when we’re able to create a net for a given solid.

Vocabulary Convex Polyhedron Net Nonconvex (or Concave) Polyhedron (Line) Segment

Quick Reminder A polyhedron is a solid formed by polygons. They have edges, vertices and faces. There are two types of polyhedrons: prisms and pyramids.

Convex Polyhedrons Contains all line segments connecting any two vertices (corners) within it Every face of a convex polyhedron can be laid out on a flat surface

Nonconvex (Concave) Polyhedrons Has at least one line segment connecting two vertices (corners) outside it

Nets The net of a polyhedron is the 2-dimensional plane figure we get when the surfaces of the solid are laid out flat (unfolded).

Possible Nets of a Triangular Prism

Possible Nets of a Square Pyramid

Let’s Practice Grade 5 Grade 6 Page 90 #1 #2 Page 91 #3 Page 93 #1 Page 94 #2 Page 95 #3 Once finished, complete the worksheet(s) provided. Then, you can work on your narrative or read quietly.