11 1 space figures and cross sections
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11-1 Space Figures and Cross Sections. Objectives To recognize polyhedra and their parts To visualize cross sections of space figures. A polyhedron is a space figure, or three-dimensional figures, whose surfaces are polygons. Each polygon is a face of the polyhedron .

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11-1 Space Figures and Cross Sections

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11 1 space figures and cross sections

11-1Space Figures and Cross Sections

  • Objectives

  • To recognize polyhedra and their parts

  • To visualize cross sections of space figures


A polyhedron is a space figure or three dimensional figures whose surfaces are polygons

A polyhedron is a space figure, or three-dimensional figures, whose surfaces are polygons.

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.


Vertices

Vertices:

D, E, F, G, H

Edges:

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

Faces:

GHD

EFH

FGH

DEH

and quadrilateral DEFG


Cross section the intersection of a solid and a plane

Cross Section: the intersection of a solid and a plane

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


Describe the cross section

Describe the cross section.

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

The cross section is a rectangle.


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