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Figures in 3 Dimensions. Platonic Solids. 20 equilateral triangles. Other Polyhedrons. Octagonal prism Square antiprism Dodecahedron (regular) Cuboctahedron Stellated dodecahedron Isosidodecahedron ( quasiregular ) Elongated pentagonal cupola. Definitions. 2-D figure Closed

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Platonic Solids

20 equilateral triangles


Other Polyhedrons

Octagonal prism

Square antiprism

Dodecahedron (regular)

Cuboctahedron

Stellated dodecahedron

Isosidodecahedron (quasiregular)

Elongated pentagonal cupola


Definitions
Definitions

  • 2-D figure

  • Closed

  • All lines are straight

Polygon

Polyhedron

  • 3-D figure

  • Closed

  • All faces are flat with straight edges


Classification
Classification

  • How many faces does it have?

  • How many vertices does it have?

  • How many edges does each face have? (Can there be more than one type of polygon for a face?)

  • Are there any concavity?

  • Does it create a recognizable shape?



Classification2
Classification

Requirements for your classification:

1. Classify at least sixteen different 3-D shapes

2. For each one, include its the name and a best-effort drawing

3. Include at least 4 levels of classification (vertical)

Animals

Mammals

Reptiles

Insects

Land

Aquatic

Classification not complete!!!

Dog

Cat

Whale


Classification3
Classification

Requirements for your classification (continued):

4. Include at least 6 different categories (horizontal)

5. For each category, also write the criteria that a shape must meet to fit that category

Animals

Mammals:

Fur, warm-blooded

Reptiles:

No fur, cold-blooded

Insects:

Six legs, exoskeleton

Rodents:

Use teeth to gnaw, wide field of vision

Carnivores:

Large, predators, eat other animals

Aquatic:

Live underwater, feed on plankton and/or fish


Classification4
Classification

Requirements for your classification:

Classify at least sixteen different 3-D shapes

For each one, include its the name and a best-effort drawing

Include at least 4 levels of classification (vertical)

Include at least 6 different categories (horizontal)

For each category, also write the criteria that a shape must meet to fit that category


Drawing
Drawing

Cube

Sphere


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