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Presentation transcript:

Warm Up:

Unit 2 - Transformations Lesson 17.2 Similarity Transformations

No. A dilation could make the heart bigger, but it couldn’t make the heart rotate. No. The shape stays the same, but the size changes.

Margins of pg. 249: Add the following: RECALL: r stands for reflection T stands for Translation R stands for Rotation Rotation Rules (clockwise): 90o (x, y)  (y, -x) 180o (x , y)  (-x, -y) 270o (x, y)  (-y, x)

Things to remember: Multiple transformations on same grid/with same figure Work from the inside out (right to left) Label original points, plot on new axis. Perform the reflection over the line y = 1 New coordinates: Dilation, k = 2 New Coordinates: PAY ATTENTION TO WHAT EACH GRAPHS AXIS COUNTS BY

Label original points, plot on new axis. Dilation, k = 1 4 New coordinates: Rotation CCW 90 (270CW) New Coordinates: PAY ATTENTION TO WHAT EACH GRAPHS AXIS COUNTS BY

Label original points, plot on new axis. Perform the reflection over the line y = 1 New coordinates: Translation (x,y)  (x +2, y – 2) New coordinates: Dilation, k = 4 New coordinates: They’re the same shape as the original, but not the same size.

Homework: Pg 251 # 11 & 12 Do in the book on the same coordinate grid Clearly label each problem You must attempt every problem for full credit. Whatever isn’t finished is homework.