Plotting Points
What are the coordinates at the origin?
(0,0)
If coordinate P (2,1) is translated 3 units up, what is the coordinates of P'?
(2,4)
If coordinate C (9,1) is reflected over the x axis, what are the coordinates of C'?
(9, -1)
What is the difference between a line and a line segment?
Line has arrows (goes on forever),
line segment doesn't (it's finite)
The point at (0, 6) is rotated 180o about the origin. What are the coordinates of the image of the point?
(0, -6)
Which direction do you move on the x-axis?
Across (left to right)
If coordinate X (3,5) is translated 2 units down, what are the coordinates of X'?
(3,3)
If coordinate I (8, 7) is reflected over the y axis, what are the coordinates of I'?
(-8, 7)
What is the word for just moving a shape without changing its size, shape, or orientation?
translation
Describe the transformation of the algebraic rule below:
(x,y) --> (-x, -y)
It is a 180o rotation around the origin.
Which quadrant would the point (3, 1) lie in?
Quadrant I
If coordinate G (-1, -5) is translated 2 units right and 4 units up, what are the coordinates of G'?
(1, -1)
If coordinate U (0,9) is reflected over the x axis, what are the coordinates of U'?
(0, -9)
What is the word for flipping a shape over an axis?
Reflection
90o counterclockwise gives the same result as
_____o clockwise.
270
What is the quadrant in which (-2, -3) lies?
Quadrant III
If coordinate J (9,8) is translated 10 units left and 1 unit up, what are the coordinates of J'?
(-1, 9)
If coordinate V (1,1) is reflected over the Y axis and then translated down 1 unit, what is the new coordinate?
(-1, 0)
What is the original image called?
Pre-image
A triangle (3 sides) has been rotated 90o clockwise. Is it true that the image is identical to the pre-image?
No
Which property changes when a figure is reflected across a line?
A side lengths
B angle measures
C area
D orientation
D orientation
A triangle is translated 4 units down and 8 units to the right. Which translation returns it to its original location?
A (x, y) --> (x - 8, y + 4)
B (x, y) --> (x - 4, y + 8)
C (x, y) --> (x + 4, y - 8)
D (x, y) --> (x + 8, y - 4)
A (x, y) --> (x - 8, y + 4)
If coordinate H (5,7) is translated 2 units down and then reflected over the x axis, what are the coordinates of H'?
(5,-5)
An x = line is always __________________,
a y = line is always ____________________.
(vertical or horizontal in each line?)
vertical
horizontal
In the coordinate plane, A'B'C' is the RESULT after a 270o counterclockwise rotation. How many degrees, in what direction, would we need to rotate to find its original pre-image?
270o clockwise
(or 90o counterclockwise)