Translations
When translating a figure, you do this to the preimage.
What is slide?
When reflecting an image, you do this to the preimage.
What is flip?
Solve: 6a + 5a = −11
When dilating a figure, you do this to the preimage.
What is make it bigger or smaller?
This angle is greater 90 degrees but less than 180 degrees.
What is an obtuse angle?
In words, describe the translation: (x,y) --> (x+8, y-4)
Right 8 units, down 4 units.
Find the new coordinates of (3,-2) after a reflection over the x-axis.
What is (3, 2)?
Solve: k − 2 + 3 = −2
k = -3
What happens to your preimage when dilating the figure by a scale factor of 1/2?
The image reduces in size.
Two angles whose sum is 90°.
What are complementary angles?
Write the proper notation using the point (x, y) after a translation of 3 units left and 7 units up.
What is T(x-3,y+7)?
What are two methods that can be used to reflect an image?
Use the rule to change the signs or count boxes.
Solve: 18 = 3(3x − 6)
x = 4
What is W' after taking Point W (2, -9) and dilating the point by a scale factor of 4?
W' (8, -36)
The supplement of a 79o angle.
What is a 101o?
What is A' after taking Point A (-1, 0) and shifting it two units right and 4 units down?
A' (1, -4)
What is Z' after taking Point Z (-1, 5) and reflecting it over the y-axis?
What is (1, 5)?
Solve: 8(1 + 5x) + 5 = 13 + 5x
x = 0
This letter can be used to represent the scale factor.
What is k?
x = 33o
Write the rule: Triangle L (0, 3), M (6, 4), N (3 ,9) becomes Triangle L' (6, -1), M' (12, 0), N' (9, 5)
T (x + 6, y - 4)
If Point A (-8, 5) becomes Point A' (-8, -5), what was the line of reflection?
The x-axis.
Solve: 3 + 5n = 5(n + 2) - 7
Infinitely Many Solutions
Determine the scale factor: D (3, 9), E (6, 6), F (6, 0) becomes D' (1, 3), E' (2, 2), F' (2, 0).
Two supplementary angles are represented by (2x+15)o and (3x+10)o, find x.
x = 31