
Reflections Lesson
Presentation
•
Mathematics
•
9th - 12th Grade
•
Medium
Standards-aligned
Jennifer Ryan
Used 11+ times
FREE Resource
5 Slides • 18 Questions
1
Reflections as Transformations
2
Watch this video
On the next slide you will watch a brief video. Take notes as you watch it, paying attention to sign changes for the x and y variables and symmetry with repsct to the line of reflection.
3
I can determine the reflection rule when an image is reflected over the x-axis, the y-axis, or the line y = x.
I can determine the location of an image reflected over any line by determining the distance from the line of reflection.
Learning Targets
4
5
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
6
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
7
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
8
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
9
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
10
Multiple Choice
Select the signs for x and y that correctly map the preimage (blue) onto the image (red).
(-x, -y)
(x, -y)
(-x, y)
no reflection
11
Multiple Choice
True or false: When a point is reflected across a line of symmetry, it remains the same distance from the line.
true
false
12
Multiple Choice
True or False: When a figure is reflected over a line of reflection, the new image is congruent to the original.
True
False
13
Multiple Choice
Reflections over the x-axis change the ____-__________.
y-coordinate
x-coordinate
14
Multiple Choice
Find K' if the figure is reflected across the x-axis
(4, 1)
(-1, -4)
(1, -4)
(1, 4)
15
Multiple Choice
Reflect over x-axis. Which point would be at (3, -6)
A
B
C
H
16
Multiple Choice
What is the line of reflection?
17
Multiple Choice
What is the line of reflection?
18
Multiple Choice
∆QRS contains the points: Q(4, 2) R(5, 1) S(3,7). If the triangle is reflected across the y-axis, what will S' be?
S'(3, 7)
S'(-3, 7)
S'(-3, -7)
S'(3, 7)
19
Multiple Choice
Point C (-5, 4) is reflected over the x-axis. What are the coordinates of C'?
(5, 4)
(-5, -4)
(5, -4)
(-5, 4)
20
Multiple Choice
The reflection of J (-1,11) is J' (-1, -11). what is the reflection of D (5, -5) when reflected over the same axis of reflection?
(-5,5)
(5,5)
(5,-5)
(-5, -5)
21
Multiple Choice
The point (a, b) is reflected over the y-axis, then the x-axis, then the y-axis again, and then the y-axis again. What are the coordinates of the new point?
(−a, b)
(−a, −b)
(a, −b)
(a, b)
22
I can determine the reflection rule when an image is reflected over the x-axis, the y-axis, or the line y = x.
I can determine the location of an image reflected over any line by determining the distance from the line of reflection.
Learning Targets
23
Poll
What is your comfort level with reflections?
Reflections as Transformations
Show answer
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