
4.4 Congruence and Transformations
Presentation
•
Mathematics
•
10th Grade
•
Easy
Standards-aligned
Larry Cooper
Used 12+ times
FREE Resource
16 Slides • 15 Questions
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4.4 Congruence and Transformations
" REAL TRANSFORMATIONS require real honesty. If you want to move forward, get real with yourself."
-Unknown
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Properties of Sequences of Rigid Motions
Size and shape stay the same.
Angle measures stay the same.
Area and perimeter stay the same.
Parallel segments or lines stay parallel.
Pre-image and image are congruent.
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Multiple Choice
Which of the following describes the sequence of transformations shown? #1
Reflect across the x-axis and then rotate -90 degrees around the origin
Rotate -90 degrees around the origin and then translate down.
Reflect across the x-axis and then reflect across the y-axis.
Translate up and then rotate 90 degrees about the origin.
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Multiple Choice
Which of the following are congruence transformations? #3
Rotations
Translations
Reflections
All Three
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Multiple Choice
Which of the following is a rigid motion? #24
(x,y)→(3x,y)→(x+5,y−8)→(−x,y)
(x,y)→(−x,−y)→(x−3,y+8)→(−x,y)
(x,y)→(−y,x)→(−2x,2y)→(−x,y)
(x,y)→(21x,y)→(x+5,y−8)
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Multiple Choice
Which sequence of transformations maps
Quadrilateral WXYZ onto Quadrilateral W"X"Y"Z"? #22
A 90° counter-clockwise rotation, then a translation.
A reflection across the y-axis, then a reflection across the x-axis.
A translation, then a reflection across the y-axis.
A translation, then a reflection across the x-axis.
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Multiple Choice
Which sequence of transformations maps the green triangle to the red triangle to the blue triangle? (NOT ON THE PACKET)
A rotation, then a translation.
A translation, then a rotation.
A translation, then a reflection.
A rotation, then a reflection.
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Multiple Choice
What is the image of point ( 4,2) after the composition of transformations defined by reflection over y=x, (x, y) → (y, x), and a 90 degree counter clockwise rotation around the origin, (x, y) → (–y, x) ? #11
(-4, 2)
(4, -2)
(-4, -2)
(2, -4)
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Multiple Choice
What is the ordered pair for the final location of P( -7, 3) after this series of transformations? (x,y)→(x, y+3) then rotated 90° clockwise about the origin. #25
P′(−7, 6)
P′(−7, −6)
P′(6, −7)
P′(6, 7)
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Multiple Choice
Figure WXYZ is transformed using the rule (x, y) → (x -4, y +2) then a reflection over the y-axis, (x, y) → (–x, y). #12
Point W of the pre-image is at (1, 6).
What are the coordinates of point W" on the final image?
(–5, 8)
(–3, –8)
(5, –8)
(3, 8)
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Multiple Choice
Identify the sequences of transformations from the red image to the blue image. #26
reflection over the x-axis then rotation of 90° counterclockwise
reflection over the y-axis then rotation ofundefined counterclockwise
translation of 2 units to the right then rotation ofundefinedclockwise
rotation of 180° counterclockwise
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Multiple Select
Which transformation was performed on the new image? #27
reflect over the x-axis, then rotate 90
reflect over the y-axis, then translate
rotate 90, then translate
reflect over the x-axis, then translate
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Multiple Select
Which transformation was performed on the new image? Select all that apply. #28
rotate 90 cw
translate: 4 units right and 5 units down
reflect over x-axis
rotate 270 cw
reflect over y-axis
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Multiple Choice
Scale Factor=Pre−ImageImage Which could be the rule used to dilate ABC to A'B'C'? #16
(5x, 5y)
(3x, 3y)
(1/3 x, 1/3 y)
(2x, 2y)
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Multiple Choice
Enlargement or reduction? Find the scale factor! #14
It's a reduction; the scale factor is 2.
It's an enlargement; the scale factor is 2.
It's an enlargement; the scale factor is 1/2.
It's a reduction; the scale factor is 1/2.
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Multiple Choice
A triangle has vertices with coordinates (2,0), (3, -1), and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?
(5,3), (6,2), (1,-2)
(6,0), (9,-3), (-6,-15)
(2/3,0), (1,-1/3), (-2/3,-5/3)
(-1,-3), (0,-4), (-5,-8)
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Multiple Choice
Dilate the figure by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?
A(3,3) B(6,6) C(9,3)
A'(9,9) B'(18,18) C'(27,9)
A'(6,6) B'(9,9) C'(12,6)
A'(0,0) B'(3,3) C'(6,0)
A'(1,1) B'(2,2) C'(3,1)
4.4 Congruence and Transformations
" REAL TRANSFORMATIONS require real honesty. If you want to move forward, get real with yourself."
-Unknown
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