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Williamsburg High School for Architecture and Design

Redefining Career & Technical Education in New York City Since 2009

You are here: Home / Teacher Posts / Unit 6: Topic 3 (Dilations)

Unit 6: Topic 3 (Dilations)

February 5, 2015 By Ms. Bruno

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A dilation is a transformation that causes a figure to change size but keep the same shape.

 

The image and the preimage are similar.

 

This means that a dilation is NOT an isometry and it is the only type of transformation that we will work with this year that isn’t.

notation

 

This notation means that we simply take our k (scale factor) and multiple it by the x and y values of our coordinates to get a new point. If 0<k<1 we get a smaller figure. If k>1 we get a larger figure.

 

Classwork and Homework:

[gview file=”https://www.whsad.org/wp-content/uploads/2015/02/Lesson-6-Activity-Sheet.docx”] [gview file=”https://www.whsad.org/wp-content/uploads/2015/02/Lesson-6-Homework.docx”]

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About Ms. Bruno

Ms. Bruno has been an Assistant Principal at Williamsburg High School for Architecture and Design since 2009. She oversees the departments of Science, Mathematics, Architecture and Design (Career and Technical Education (CTE)), Physical Education and Health. She can be reached at 718-388-1260 ext. 2080, or bruno@whsad.org.

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