Translations
A reflection is when you do this to a figure.
What is flip it or make a mirror image of it?
A dilation is when you do this to a figure.
What is enlarge or reduce it?
This word means "the same"
What is congruent?
We do this with the scale factor to dilate a figure
What is multiply it?
Find the new coordinates of (10,12) if you translate the point three units left and 4 units up.
What is (7,16)?
Find the new coordinates of (3,-2) after you reflect the point over the x-axis.
What is (3,2)?
Find the new coordinates of (3,-2) if you dilate the point with a scale factor of 4.
What is (12,-8)?
We do this to find the scale factor that was used to dilate a pre-image to an image.
What is divide the image by the pre-image? (image/ pre-image or new/original)
Write the algebraic rule of point (x,y) after it moves 3 spots to the left and 7 spots up.
What is (x-3,y+7)?
Write the algebraic rule of point (x,y) after it is reflected over the y-axis.
What is (-x,y)?
Write the algebraic rule of point (x,y) after it is dilated with a scale factor of 6.
What is (6x,6y)?
These properties change under a reflection.
What are orientation and location?
The perimeter of a dilated figure is this many times (multiplied) the original if the scale factor is 5.
What is 5 times?
Describe the translation for this algebraic rule: (x,y) --> (x + 8, y + 4)
What is a translation of 8 units to the right and 4 units up?
When a figure is reflected over the x-axis the y-coordinates do this
What is change to opposite signs?
Triangle XYZ is dilated using the following rule:
(x,y) --> (0.5x, 0.5y)
Original coordinates are X(-4,-4), Y(-4,0), Z(4,-4)
What are the coordinates of Z' ?
What is (2,-2)?
The area of a figure is this many times the original if the scale factor used is 12.
What is 144 times? (or 12 squared)
Coordinates of ∆LMN after a translation of 6 units to the right and 4 units down. L(0,3) M(6,4) N(3,9)
What is L'(6,-1), M'(12,0), N'(9,5)?
Coordinates of rectangle DEFG after a reflection over the y-axis when D(5,5) E(5,8) F(8,8) G(8,5)
What is D'(-5,5), E'(-5,8), F'(-8,8), G'(-8,5)?
The coordinates of D'E'F' after a dilation on DEF with a scale factor of 0.5. D(2,8) E(2,2) F(6,2)
What is D'(1,4), E'(1,1), F'(3,1)?
This word means that two shapes are proportional but not exactly the same
What is similar, or similar figures?
The original area of a figure was 25ft2. This is the new area of a figure if the scale factor used was 9.
What is 2025ft2?