Reflection Size does not change shape may or may not change in orientation Reflected over y axis Reflected over x axis Reflected over y axis y coordinates stay the same Reflected over y axis ID: 915077
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Slide1
Reflections
Slide2Reflection
Mirror image over the x axis or the y axis
Slide3Reflection
Size does not change, shape may or may not change in orientation.
Slide4Reflected over y axis
Slide5Reflected over x axis
Slide6Reflected over y axis
y coordinates stay the same
Slide7Reflected over y axis
x coordinates are opposite
Slide8Reflected over x axis
Slide9Reflected over x axis
x coordinates stay the same
Slide10Reflected over x axis
y coordinates are opposite
Slide11Slide12Slide13Reflect over y axis
Slide14Reflect over x axis
Slide15A
B
C
D
Slide16This Guy is a Jerk!
Slide17What do you notice about your new coordinates?
If reflecting over the y axis, the y coordinates will stay the same and the x coordinates will be opposite
The same is true for reflecting over the x axis. The x coordinates will stay the same and the y coordinates will be opposite.
Slide18Write the coordinates of the new shape reflected over the x axis
Original Shape:
A (-2, 5)
B (-5, 5)
C (-3, 2)
Reflected Shape
A’ ( , )
B’ ( , )
C’ ( , )
Slide19Write the coordinates of the new shape reflected over the y axis
Original Shape:
A (-2, 5)
B (-5, 5)
C (-3, 2)
Reflected Shape
A’ ( , )
B’ ( , )
C’ ( , )
Slide20What if the shape is located on the line of reflection?
Slide21Reflect over the y axis
Slide22Reflect over the x axis
Slide23Reflecting Over Other
Lines
x
= 4
Note: When reflecting over a line that is not the x or y axis, we cannot use the opposite coordinate rule.
Slide24Reflecting Over Other
Lines
y = -2
Note: When reflecting over a line that is not the x or y axis, we cannot use the opposite coordinate rule.
Slide25Closure
What is the difference between a translation and a reflection?
Slide26Closure
Is the resulting transformation of a shape similar or congruent?