Unit 1 Transformations Lesson 3 Rotations Objective To

Unit 1: Transformations Lesson 3: Rotations Objective: To identify, represent, and draw the rotations of geometric figures in the coordinate plane. rotation – a transformation where a figure “turns” around a point called the center of rotation.

Think of the coordinate plane as if it were a circle. Degrees we can rotate a figure around the plane: L K H

Describe the rotation of the pre-image to the image. Degree? Direction? Center? L K H H' L' What are the coordinates for the pre-image and image? H( , ) � H’ ( , L ( , ) � L’ ( , K ( , ) � K’ ( , K' What would be the function rule? (x, y) �( , )

Describe the rotation of the pre-image to the image. Degree? Direction? Center? L K H H' K' L' What are the coordinates for the pre-image and image? H ( -1 , 1 ) � H’ ( , L ( -2 , 4 ) � L’ ( , K ( -6 , 3 ) � K’ ( , What would be the function rule? (x, y) �( , )

Describe the rotation of the pre-image to the image. Degree? Direction? Center? K' L K H L' H' What are the coordinates for the pre-image and image? H ( -1 , 1 ) � H’ ( , L ( -2 , 4 ) � L’ ( , K ( -6 , 3 ) � K’ ( , What would be the function rule? (x, y) �( , )

L' K' K Describe the rotation of the pre-image to the image. Degree? Direction? Center? L H H' What are the coordinates for the pre-image and image? H ( -1 , 1 ) � H’ ( , L ( -2 , 4 ) � L’ ( , K ( -6 , 3 ) � K’ ( , What would be the function rule? (x, y) �( , )

Rotate triangle ABC over. . B C A a. ) 90 CC e. ) 90 C b. ) 180 CC f. ) 180 C c. ) 270 CC d. ) 360 C

Assignment Graph the figure with coordinates A (0, 6), B(6, 6), and C(7, 3). Label each rotation, using this figure as the pre-image each time. 1. 90 CC 2. 90 C 3. 180 CC 4. 360 C 5. 270 CC