
Reflection Rules
Presentation
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Standards-aligned
Lanatra Simpson
Used 4K+ times
FREE Resource
7 Slides • 4 Questions
1
Reflection Rules
February 9, 2021
2
Reflection
Represents the flipping of an image
When an object is reflected, the pre-image and image are always congruent (SAME SIZE AND SAME SHAPE)
3
4
Reflection through the origin
5
Rules
Over the x-axis (x, -y) = This means keep the sign of x and change the sign of y
Over the y-axis (-x, y) = This means change the sign of x and keep the sign of y
Through the origin (-x, -y) = This means change the sign of both x and y
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7
8
Multiple Choice
Which answer shows a reflection across the x-axis?
d
c
b
a
9
Multiple Choice
Point C (-5, 4)
Reflect over the x-axis.
What is C'?
(5, 4)
(-5, -4)
(5, -4)
(-5, 4)
10
Multiple Choice
What would be the coordinates of point K if it was reflected over the Y-axis?
(-5, 2)
(5, 2)
(5, -2)
11
Multiple Choice
What would be the coordinates of point K if it was reflected over the x-axis?
(-5, -2)
(-5, 2)
(5, -2)
Reflection Rules
February 9, 2021
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