monday 9.26 -...
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MONDAY 9.26.11
* Go over HW questions from 1.6
* Wrap up Chapter 1 Section 1.7
** QUIZ TOMORROW: 1.1 1.7
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Define:Transformation: change in position, size, or shape of an object
Pre-image: the original object
Image: the final object
Arrow notation( ): Also known as mapping, the process of going from the pre-image to image.
1-7: Transformations in the Coordinate Plane
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Example 1: Identify each transformation. Then use arrow notation to describe the transformation.
A. B.
C. D.
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Draw and identify Transformations:1. Plot points.
2. Use straight edge to connect vertices
3. Look for transformation
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Example 2:a. A figure has vertices at E(2, 0), F(2, -1), G(5, -1) and H(5, 0).
After a transformation the image has vertices at E‛(0, 2), F‛(1, 2), G‛(1, 5) and H‛(0, 5). Draw and identify transformation.
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Example 2:b. A figure has vertices at A(1, -1), B(2, 3), and C(4, -2). After a
transformation the image has vertices at A‛(-1, -1), B‛(-2, 3), and C‛(-4, -2). Draw and identify transformation.
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Example 3: Find the coordinates for the image of ∆ABC after the translation (x, y) → (x + 3, y - 4). Draw the image
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Example 4: Find the coordinates for the image of ∆ABC after the translation (x, y) → (x + 2, y - 1 )
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Example 5: The figure shows part of a tile floor. Write a rule for the translation of hexagon 1 to hexagon 2.
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