1. Solid (3D) Figures
I can identify, classify, and compare three dimensional geometric figures using appropriate terminology and vocabulary.

2. ESSENTIAL QUESTIONS
What are 3 dimensional geometric figures? How are they classified?
What are 3 dimensional geometric figures? How are they related to polygons? 2

3. Let’s Review Polygons
What makes geometric shapes (polygons) different from each other?
We never looked at circles, ovals, or anything with curved sides. Do you know why these shapes weren’t included with polygons?
Why is it important to know how many edges and vertices a polygon has?
Turn to your shoulder partner and tell them what you think about all these questions!

4. What makes geometric shapes (polygons) different from each other?
The number of sides, or edges, is what tells us what kind of polygon we have – triangle, quadrilateral, pentagon…
We never looked at circles, ovals, or anything with curved sides. Do you know why these shapes weren’t included with polygons?
Polygons only include shapes with straight edges!
But now we will be talking about these kinds of shapes.
Why is it important to know how many edges and vertices a polygon has?
There is a direct relationship between how many edges and vertices a polygon has and what name it has –
tri=3, quad=4, penta=5, hexa=6…

5. Time to take notes Let’s go!
We will be learning some basic terms today, take notes and draw & label pictures if you need to.
We will cover:
Faces
Edges
Vertices
Prisms
Cubes
Pyramids
Curved Solids
Let’s go!

6. The sides of a solid figure are called faces.

7. Edges are formed
when two faces meet.
edge

8. A vertex is formed where three or more edges meet.
Vertices is the plural form of vertex.

9. Polyhedron
A polyhedron is a solid with flat faces. figure (from Greek poly- meaning "many" and -edron meaning "face").
Each face is a polygon or 2-D figure. (a flat shape with straight sides).
So, to be a polyhedron there should be no curved surfaces.

10. A prism is a polyhedron that has 2 congruent bases.
base - bottom face of a solid figure

11. triangle triangular prism rectangle rectangular prism hexagon
Prisms are named according to their bases.
Base Name of Prism
triangle
triangular prism
rectangle
rectangular prism
hexagon
hexagonal prism

12. This is a special prism called a cube. All of its faces are squares.
It is a type of rectangular prism!

13. A pyramid is a polyhedron with only one base
A pyramid is a polyhedron with only one base. All other faces are triangles that meet at the same vertex.

14. triangle triangular pyramid rectangle rectangular pyramid pentagon
Pyramids are named according to their bases as well!
Base Name of Pyramid
triangle
triangular pyramid
rectangle
rectangular pyramid
pentagon
pentagonal pyramid

15. Which is correctly labeled?
Square Prism
Rectangular prism
Circular Polyhedron

16. Let’s count the parts of a triangular prism.

17. Faces _______ 5

18. Edges ________ 9

19. Vertices _______ 6

20. Solids with curved surfaces are NOT polyhedrons.
vertex
Cone - a solid figure with one circular base and one vertex
Cylinder - a solid figure with two congruent circular faces
circular base

21. A very special curved solid is called a Sphere – you just know it as a ball!
A sphere has only one surface or face.
It has no edges nor vertices.

22. Closure
In your notebook, describe the attributes of one three-dimensional geometric shape.
Draw a picture of your shape after you write down its attributes. 22