Translation
What two things stay the same?
Size and shape
What two things stay the same?
Size, and shape
Rule for rotating 90 degrees CLOCKWISE?
(X, Y) becomes (y, -x)
What is the definition of dilation?
To enlarge or reduce a figure
What is scale factor?
The number used to change the size of a figure.
Which Quadrant would point (1,2) be in AFTER it was translated 3 units down?
quadrant 4
which quadrant would point (-2, -3) be in AFTER it is reflected across the X- AXIS?
Quadrant 2
Rule for rotating 270 degrees CCW?
(X, Y) BECOMES (Y, -X)
What happens to a figure if it has been dilated? (what stays the same, what becomes different?)
Same shape, different size
FILL IN THE BLANK:
If the scale factor is less than 1, the image will be ____________
if the scale factor is greater than 1, the image will be ____________
k<1 = reduced
k>1 = enlarged
What are the signs for points in quadrant 2?
(-, +)
What happens to the points when it is reflected across the X- AXIS?
X value stays the same
Y value becomes the opposite
Rule for rotating 180 degrees?
(x, y) becomes (-x, -y)
If my scale factor is greater than ONE, is that an enlargement or reduction?
Enlargement
How do you convert a mixed number to an improper fraction?
(MAD)
Multiply the denominator and the whole number,
then add that number to the numerator, and
keep your same denominator
If you start at point (0,0), move 2 units left, and 4 units up, what location is your translated point?
(-2,4)
What happens to the points when it is reflected across the Y- AXIS?
Y value stays the same
X value becomes the opposite
If I started at the origin, where would my point be if I rotated it 270 degrees counterclockwise?
still at the origin
If point A (2,5) was dilated by a scale factor of 2, and the center of dilation is the origin, what would the new point be?
(4, 10)
What does proportional mean in your own words?
corresponding in size. (could be side lengths, angles, the figure)
Correctly label all 4 quadrants and their signs
(check board)
What quadrant would a point in quadrant 4 be in, if it was reflected across the x-axis, and then reflected across the y-axis?
quadrant 2
(rule: (x,y) becomes (y,-x))
(1, 3)
If a rectangle was 6 inches long, and 2 inches wide, what would be the side lengths of the rectangle if it was dilated by a scale factor of 1/2 and the center of dilation was the origin?
3 inches long and 1 inch wide
What does Equivalent mean in your own words?
Equal in some way. They may not look exactly the same, but their values are equal.