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3D Solids Vocabulary 6 th Grade Math

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Page 1: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

3D Solids Vocabulary

6th Grade Math

Page 2: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Polygon

A polygon is a closed figure formed by three or more line segments.

Page 3: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Examples of Polygons

Page 4: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

These Figures ARE NOT Polygons

Why is this figure not a polygon?

It is not made of 3 or more line segments!

Why is this figure not a polygon?

It is not CLOSED!

Page 5: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Face

A face is a flat surface of a

3-dimensional figure.

Page 6: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

This is a face. This face is a

polygon.

This is a face. It is circular and

may also be called a base.

Page 7: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Edge

An edge is a line segment where two faces or a face and

lateral surface of a 3-dimensional

figure meet.

Page 8: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Think about this…

Where do we find the edges on a 3-

dimensional figure?

Page 9: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

This figure has many edges

…and one

more that we

can’t see!

Page 10: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Does this figure have any edges?

Yes…because the

faces meet the lateral surface.

Face or circular base

Lateral Surface

Page 11: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Vertex (plural – Vertices)

A point…1) Where three or more edges

of a polyhedron meet.2) Opposite the base of a

cone.

Page 12: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

This triangular pyramid

has 4 vertices.

Page 13: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Does this cone have a vertex?

Yes! It does have a point opposite

of the face or circular base –

therefore it does have a vertex!

Page 14: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Basebase of a cone – flat circular part,

which may also be called a face

base of a pyramid -polygonal

region that does not intersect

with other faces at the vertex

Page 15: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Bases, cont.bases of a prism –

the two parallel and congruent

regions

bases of a cylinder – the two parallel, circular regions

http://rc.usf.edu/soft/dlpoly/USRMAN/hexa.jpg
Page 16: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Cylinder

A cylinder is a 3-dimensional figure with two

parallel, circular bases

or faces.

Page 17: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Cone

A cone is a 3-dimensional figure with

a circular base or face.

Page 18: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

PrismA prism is a 3-

dimensional figure with two parallel, congruent bases, and all faces that

are parallelograms (rectangles, etc.).

Page 19: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Naming PrismsPrisms are named

by the shape of their bases (the two sides that are congruent and parallel).

triangular prism

pentagonal prism

Page 20: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Pyramids

A pyramid is a 3-dimensional

figure with one base and

triangular faces.

Page 21: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Naming Pyramids

A pyramid is named by the shape of its base.

triangular pyramid

Page 22: 3D Solids Vocabulary 6 th Grade Math. Polygon A polygon is a closed figure formed by three or more line segments

Definitions adapted from…

•http://intermath.coe.uga.edu•Geometry to Go, published by

Great Source•Teaching Student Centered

Mathematics, Grades 5-8, by John Van de Walle &

LouAnn H. Lovin

http://intermath.coe.uga.edu/

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