Warm Up

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Warm Up
Problem of the Day
Lesson Presentation
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Learn to name three-dimensional figures.
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Vocabulary
polyhedron face edge vertex prism base pyramid cyl
inder cone
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A ___________________ is a three-dimensional
object, or solid figure, with flat surfaces,
called ____________, that are polygons.
When two faces of a three-dimensional figure
share a side, they form an __________. On a
three-dimensional figure, a point at which three
or more edges meet is a _____________ (plural
vertices).
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Additional Example 1 Identifying Faces, Edges,
and Vertices Identify the number of faces, edges,
and vertices on each three-dimensional
figure. A. B.
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Check It Out Example 1 Identify the number of
faces, edges, and vertices on each
three-dimensional figure. A. B.
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A _____________ is a polyhedron with two
congruent, parallel ____________, and other faces
that are all parallelograms. A prism is named for
the shape of its bases. A ______________ also has
two congruent, parallel bases, but bases of a
cylinder are circular. A cylinder is not a
polyhedron because not every surface is a polygon.
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A ______________ has one polygon shaped base, and
the other faces are triangles that come to a
point. A pyramid is named for the shape of its
base. A ____________ has a circular base and a
curved surface that comes to a point. A cones is
not a polyhedron because not every surface is a
polygon.
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Additional Example 2A Naming Three-Dimensional
Figures Name the three-dimensional figure
represented by the object.
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Additional Example 2B Naming Three-Dimensional
Figures Name the three-dimensional figure
represented by the object.
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Additional Example 2C Naming Three-Dimensional
Figures Name the three-dimensional figure
represented by the object.
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Check It Out Example 2A Name the
three-dimensional figure represented by the
object.
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Check It Out Example 2B Name the
three-dimensional figure represented by the
object.
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Check It Out Example 2C Name the
three-dimensional figure represented by the
object.
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Lesson Quiz
1. Identify the number of faces, edges, and
vertices in the figure shown. Identify the
figure described 2. two congruent circular faces
connected by a curved surface 3. one flat
circular face and a curved lateral surface that
comes to a point