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11-1 Space Figures and Cross Sections

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- Objectives
- To recognize polyhedra and their parts
- To visualize cross sections of space figures

Each polygon is a faceof the polyhedron.

An edge is a segment that is formed by the intersection of two faces.

A vertexis a point where three or more edges intersect.

D, E, F, G, H

Edges:

DE, EF, FG, GD, DH, EH, FH, AND GH

Faces:

GHD

EFH

FGH

DEH

and quadrilateral DEFG

You can think of this as a very thin slice of the solid.

p. 691: 1, 3, 6-8, 18-20

The cross section is a rectangle.