# 16 Dilation benchmark M. A. 7. 8

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Presentation transcript:

# 16 Dilation benchmark M. A. 7. 8 # 16 Dilation benchmark M.A. 7.8.1 Use coordinate geometry to determine the change in size of a figure that is dilated by a scale factor created by :)

definition Dilation is a similarity transformation in which a figure is enlarged or reduced using a scale factor, without altering the center.

drawing & formula 8 A B C D E 2 8 D

create a question Ishiki dilated the triangle by a scale factor of 4. What is the area of the changed/dilated triangle? A B C D E 2 E 2 D 2 A B

solution The area of the dilated triangle is 32 in2. SO! steps: 8 x 8 = 64 ÷ 2 = 32 in2.

credits I would like to give thanks to Mr. Imamura for teaching us MATH! :) I would like thank Rebecca for letting me use her last name. :) I would like to thank Gelaney & James for approving my POWERPOINT! :) I would like to thank http://www.icoachmath.com/sitemap/Dilation.html