What’s in a Name?What’s in a Name?Do NowDo NowName the following polygons. What features of Name the following polygons. What features of

the shapes help you identify them?the shapes help you identify them?1. 2. 3.

4. 5. 6.

TRIANGLETRIANGLE SQUARESQUARE RECTANGLERECTANGLE

PENTAGONPENTAGON HEXAGONHEXAGON OCTAGONOCTAGON

What’s in a NameWhat’s in a Name

AgendaAgenda•PrismsPrisms•PyramidsPyramids•Other 3D structuresOther 3D structures

From 2D to 3DFrom 2D to 3DWords you will learn:Words you will learn:• PolyhedronPolyhedron• Face Face • BaseBase• Lateral FaceLateral Face• EdgeEdge• VertexVertex

PrismsPrismsTo make a prism, you need 2 congruent To make a prism, you need 2 congruent

polygons and RECTANGLES!polygons and RECTANGLES!

PrismsPrismsThe two congruent polygons will form The two congruent polygons will form

the the bases bases of the prismof the prism

The rectangles form the The rectangles form the lateral faceslateral faces

What would my What would my name be?name be?

A Pentagonal Prism!A Pentagonal Prism!

Features of the PrismFeatures of the Prism

• Faces – flat polygonal Faces – flat polygonal

surfacessurfaces• Edges – where facesEdges – where faces

meetmeet• Vertices – where edgesVertices – where edges

meetmeet

Prism SummaryPrism Summary

• 2 bases2 bases• Rectangles connect the basesRectangles connect the bases• Named after the base polygonNamed after the base polygon

I am an I am an OCTAGONAOCTAGONA

L PRISM!L PRISM!

PyramidsPyramidsTo make a pyramid you need 1 To make a pyramid you need 1

polygon and TRIANGLES.polygon and TRIANGLES.

The square is the base in this example…The square is the base in this example…PyramidsPyramids

I am a I am a SQUARE SQUARE PYRAMIDPYRAMID

And the triangles are the lateral faces.And the triangles are the lateral faces.

IntroductionsIntroductions

Hi,Hi,I am a I am a Pentagonal Pentagonal

PyramidPyramid

How many How many faces, faces,

vertices, and vertices, and edges do I edges do I

have?have?

6 faces6 faces

6 vertices6 vertices

10 edges10 edges

Pyramids SummaryPyramids Summary

• 1 base1 base• Triangles form the lateral facesTriangles form the lateral faces• Named after baseNamed after base

Compare and ContrastCompare and Contrast

What makes a pyramid different from What makes a pyramid different from a prism?a prism?

How can we draw the 3D structures?How can we draw the 3D structures?

The OthersThe Others

SphereSphere ConeCone

CylinderCylinder

QuestionsQuestions

Or Or

Comments?Comments?