Reflections
Rotations
Translations
Rules
100
When reflecting an image it is like the image is looking in a ________.
Mirror
100
What is the keyword associated with rotations?
Turn
100
What is the keyword with translations?
Slide, move, shift
100
What is the rule for rotating an image 180 degrees?
(x , y) -->(-x , -y) change the sign of both numbers
200
Reflect the point (3, 5) across the y axis
(-3 , 5)
200
What is the point (4,1) rotated 180 degrees
(-4, -1)
200
Translate the point (2,3) up 4 and to the right 2
(6, 5)
200
What is the rule for reflecting a point over the y axis?
(x , y) -->(-x , y) change the sign of the x value
300
Reflect the triangle ABC across the x axis. List the new points.
A (2, -1), B (2, 3) C (-3, 1)
A' (2, 1), B' (2, -3), C' (-3, -1)
300
What rotation occurred?
Rotation 90 degrees clockwise.
300
Mr. Morris says the rule to translate point A (-3, 4) to point A' (1, -2) is (X,Y) --> (X -4, Y +6). Is he correct? If not, write the correct rule.
He is incorrect. (X, Y) --> (X +4, Y -6)
300
What is the rule for reflecting a point over the x axis?
(x , y) -->(x, -y) change the sign of the y value
400
Reflect the quadrilateral ABCD across the y-axis. List the new points
A (-4, 6), B (-5, 3), C (-1, 3), D (-2, 6)
A'(4, 6) B' (5, 3), C' (1, 3), D' (2, 6)
400
Rotate the triangle ABC 90 degrees counterclockwise. List the new points.
A (-3, 5), B (4, -1) C (0, -3)
A' (-5,-3), B' (1, 4) C' (3, 0)
400
Explain the translation modeled by the vector.
A translation right 7 units, up 6 units.
400
What is the rule for rotating an image 90 degrees clockwise?
(x , y) -->(y, -x) Swap the numbers, flip the sign of the second number
500
Reflect the Triangle ABC across the line x = 2. Write the new points.
A (7 , 4), B (3, 4), C (5, 1)
A' (-3 , 4) , B' ( 1 , 4) C' (-1, 1)
500
Rotate the quadrilateral ABCD 90 degrees clockwise. List the new points
A (3, -4), B (6, -2), C (6, 3), D (3, 1)
A' (-4, -3), B' (-2, -6), C' (3, -6), D' (1, -3)
500
Describe the translation shown by the picture from shape X to shape Y.
A translation right 8 units, down 5 units
500
What is the rule when rotating an image 90 degrees counterclockwise?
(x , y) -->(-y, x) Swap the numbers, flip the sign of the first