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9.4 Rotations
HW pg. 602 #420 evens 1
January 28, 2013
Jan 287:35 AM
Bellwork
4. Find the point C on the xaxis so AC + BC is a minimum for A(2, 5) and B(7, 3).
Please remove your snowflake off the door and take it home.
9.4 Rotations
HW pg. 602 #420 evens 2
January 28, 2013
Jan 288:00 AM
9.4 Rotations
Center of Rotation: figure is turned about a fixed point
Angle of Rotation: rays drawn from center of rotation to a point and its image
9.4 Rotations
HW pg. 602 #420 evens 3
January 28, 2013
Jan 289:03 AM
Rules for Rotations about the Origin: 90 : (y,x)180 : (x,y)270 : (y,x)
9.4 Rotations
HW pg. 602 #420 evens 4
January 28, 2013
Jan 317:48 AM
9.4 Rotations
HW pg. 602 #420 evens 5
January 28, 2013
Jan 289:01 AM
Rotation Matrices
270 : 0 11 0[ [90 : 0 1
1 0[ [180 : [[1 0
0 1360 : 1 0
0 1[ [
9.4 Rotations
HW pg. 602 #420 evens 6
January 28, 2013
Jan 2810:57 AM
Rotation Theorem: A rotation is an isometry.
9.4 Rotations
HW pg. 602 #420 evens 7
January 28, 2013
Jan 2812:30 PM
HW pg. 602 #420 evens