Vocabulary
Also called a 'flip'. What kind of motion is this transformation?
Reflection
What is the image point (-14, 8) after a reflection in the x-axis?
(-14, -8)
Find the new coordinates of (5,4) after you rotate the point 180 degrees.
(-5,-4)
Find the new coordinates of (10,12) if you translate the point 3 unites to the left and 4 units up.
(7,16)
Enlargement or reduction: Dilation by scale factor of 4/3
Enlargement
Also called a turn. What kind of motion is this transformation?
Rotation
What is the image point (-8,10) after reflection in the y-axis?
(8,10)
Find the new coordinates of A (-7,-7), B (4,-7) and C (2,1) after rotation 90 degrees clockwise.
A' (-7,7) B'(-7,-4) C' (1,-2)
Translate the figure, A(0,3), B(1,0), C(1,1), 3 units to the left.
A(-3,3), B(-2,0), C(-2,1)
Enlargement or reduction: Dilate by a scale factor of 1/5
Also called a 'slide'. What kind of motion is this transformation?
Translation
List the images of the points A(5,4), B(8,6), and C(9,-8) ,after reflection in the y-axis.
A' (-5,4), B'(-8,6) and C'(-9,-8)
Rotation of 270 degrees clockwise is also called what kind of rotation?
Rotation 90 degrees counterclockwise
Describe the translations for this notation: (x,y) --> (x + 8, y +4)
8 units right and 4 units up
Line segment CD was dilated around the origin by a scale factor of 2. The endpoints of the image are C' (4,0) and D' (6,2). What are the coordinates of the endpoints of the original line segment?
C(2,0) and D(3,1)
The figure before transformation is the ______ while the figure after transformation is the _______.
Pre-image; Image
If a point with coordinates (x,y) is reflected in the x-axis, determine the coordinates of the image.
(x,-y)
Write the notation of the point (x,y) after it rotates 90 degrees clockwise.
(y,-x)
Find the coordinate points of (x,y) after translation 5 units to the left and 3 units down.
(x-5, y-3)
Find the new coordinates of (3,-2) after you dilate the point by a scale factor of 3.
(9,-6)
Describe in your own words the difference between similar figures and congruent figures.
Similar = same shape, not necessarily same size. Congruent = same shape, same size.
If a point with coordinates (x, y) is reflected in the y-axis, determine the coordinates.
(-x, y)
A (6, -1), B (1, -4), and C (7, -7). Rotate the shape 90 degrees counterclockwise.
A' (1, 6), B' (4, 1), and C' (-7, -7)
Describe the translation of D(-5,4), E(-4,1), and F(-2,1) to points D'(-5,0), E'(-4,-3), and F'(-2,-3)
slide 4 units down
Determine the scale factor: B(2, 5) and B'(1, 2.5)
Scale Factor of 1/2