Transformations

1
Chapter 12

• Transformations!

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Basic terms 1, 2, 3. . .

• Transformation change in a geometric figures
  position, shape, or size.
• Preimage the original figure
• Image the resulting figure

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Examples p636 7 -9
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Types of Isometry (Sect.12.1 4)
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Note concerning translation

• (p644 28- Example)
• Translations (glides) are done using vectors.
• Vector- has magnitude (size) direction
• Notation VERY similar to coordinates
• ltx, ygt ? ltx 3, y - 2gt means slide every point
  right 3 and down 2

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You try p643 22 23
7
Examples of Reflection(Review Algebra)
Reflect Triangle ABC about the following!
B
C
A
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Symmetry (p664 665)

• Reflectional symmetry (line symmetry)
• Rotational symmetry
• Point symmetry

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Tessellations

• Tessellation/Tiling (repeating pattern of figures
  that completely covers a plane, without gaps or
  overlaps!

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Exercises

• Handout (worksheet)
• WB pages (all of Chapter 12)
• Textbook pages p 636 - 673