MANY MANY FACESFACESMANY MANY FACESFACES

Reviewing Properties of Reviewing Properties of 3D figures3D figures

NAME THAT SHAPE

2

71

3

6

5

4

8

Today’s Lesson

• Today students will review the properties of 3 dimensional figures.

Vocabulary

• Polyhedron• Polygon• Face• Base• Pyramid• Prism• Cylinder• Cone• Vertex (Vertices)

• Edge• Triangular Prism• Triangular Pyramid• Rectangular Prism• Cube• Square Pyramid• Sphere

Course 3

8-4 Three-Dimensional Figures

(70’s slang)

Course 3

8-4 Three-Dimensional Figures

(Science)

Course 3

8-4 Three-Dimensional Figures

(Math Term) A solid is a closed three dimensional (3D) figure.

Solids• Two-Dimensional

(2D)• Three Dimensional

(3D)

Parts of a 3 Dimensional FigureThree-dimensional figures have faces, edges, and vertices.

•A FACEFACE is a flat surface.•An EDGE is where two faces meet.•A VERTEX is where three or more edges meet.

Vertices, Faces & Edges

• Write the number of Faces, Edges and vertices for each 3-D Figure in Activity I.

Naming 3D Figures

• Some 3D Figures have special names,

Polyhedron

A Polyhedron is a 3D figure made of Polygons.

Polygon Poly-many; gon-angle:

a 2D shape with many angles

Naming 3D Figures

• Polyhedrons • Non-Polyhedrons

Cylinders & Cones

Cylinders • 2 circular

bases• 1 face

Sphere3D circle

Cone• 1 circular

base• 1 face

Polyhedrons Breakdown

Prisms• Rectangular Faces• Two Bases

Pyramids• Triangular Faces• One Base

Naming A Polyhedron

• A Polyhedron is named for its base.A Polyhedron is named for its base.

(Shape of Base)Prism

Faces: Rectangles

Bases: Hexagon

Hexagonal

Naming A Polyhedron

• A Polyhedron is named for its base.A Polyhedron is named for its base.

(Shape of Base)Pyramid

Faces: Triangles

Base: Square

Square

NAMING POLYHEDRONS

• Write the name of each 3-D Figure on your activity sheet.