DilationDilation Page 7 DilationDilation. Write down one or two examples of how DILATIONS (scaling) are used in cartography (mapmaking), model building,

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DilationDilation Page 7 DilationDilation

Write down one or two examples of how DILATIONS (scaling) are used in cartography (mapmaking), model building, or some other field? ?

Dilation – increasing or decreasing the size of an object according to a scale factor. Notation Example: D 2 Scale factor = 2 Multiply the x and y coordinates by the scale factor. RULE:

In 1-4, use the rule (x,y)→(4x,4y) to find the image of: In 5-8, find the image of the given point under a dilation of 5.

In 9-12, Find the image using D -3 (x,y) = (-3x,-3y). In 13-18, Write a single rule for a dilation so the image of A is A’. Think of 2 ways to come up with the scale factor

You can check by extending a line from the origin through A to A’

Homework Page 7: 2-20 evens, 33AB

In 1-4, use the rule (x,y)→(4x,4y) to find the image of: In 5-8, find the image of the given point under a dilation of 5.

In 9-12, Find the image using D -3 (x,y) = (-3x,-3y). In 13-18, Write a single rule for a dilation so the image of A is A’.