
KY.HS.G.9a Remediation
Presentation
•
Mathematics
•
9th - 12th Grade
•
Easy
Briana Cook
Used 1+ times
FREE Resource
9 Slides • 9 Questions
1
2
Multiple Choice
What is a dilation?
The process of making a polygon larger or smaller without changing its shape
The process of making a polygon move up, down, left, or right without changing its shape or size
The process of making a polygon flip over an invisible line without changing its shape or size
The process of making a polygon turn along quadrants without changing its shape or size
3
-A dilation is a transformation that produces an image that is the same shape as the original, but is a different size
-When a dilation occurs, the pre-image and image are considered to be similar but NOT congruent.
4
If a dilation creates a larger image, it is called an enlargement because it stretches the original image
If a dilation creates a smaller image, it is called a reduction because it shrinks the original image
5
Multiple Choice
Which best describes an enlargement?
stretches the original image
shrinks the original image
6
Multiple Choice
Which best describes a reduction?
stretches the original image
shrinks the original image
7
Real Life Examples of Dilations
8
Real Life Examples of Dilations
9
Real Life Examples of Dilations
10
We use the scale factor(sf) to help describe and determine the type of dilation that takes place
If sf > 1; the dilation is an enlargement
is sf < 1; the dilation is a reduction
if sf = 1; the image and pre-image are the exact same
11
Multiple Choice
What does the scale factor do in a dilation?
Tells you how much the image grows or shrinks
Tells you what the center of dilation is
There's not enough information here to answer this
Nothing, it's unnecessary information
12
Multiple Select
Which scale factors would increase an image?
23
21
3.5
12
5
13
Multiple Choice
If line AB is dilated to form line A'B', what is true about the two lines?
The lines are perpendicular.
The lines are parallel.
The lines intersect.
14
Multiple Select
Which scale factors shrink an image?
0.5
43
1
12
23
15
Multiple Select
What are the properties of dilations?
Changes the size of an object
Changes the shape of an object
Changes one side but not the others
Changes all the sides equally
Changes angle measures
16
When lines are dilated, then lines are parallel.
17
When lines are dilated, the length of the image or new line is larger or smaller by the scale factor. Multiply the length of the original line by the scale factor.
18
Multiple Choice
Line AB is dilated by a factor 3.5 to form line A'B'. If the length of segment AB is 5 inches, what is the length of of segment A'B' ?
8.5 inches
17.5 inches
1.4 inches
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