Rigid Transformations
Dilations 1
Dilation 2
Similarity
Random
100
To "flip" a figure.
Reflection
100
True or False? Dilations always make a figure smaller.
False
100
Is a dilation of 1.5 an enlargement or reduction?
Enlargement (Gets bigger)
100
Draw an example of similar squares. Side lengths MUST be included!
100
When is our first quiz for Unit 2: Dilations?
TOMORROW!!!
200
To "slide" a figure.
Translation
200
A dilation might change the size of a figure's side lengths but never the _______.
angles
200
What transformations can be used to prove similarity.
List them all!
1) Translations
2) Rotations
3) Reflections
4) Dilations
200
These two triangles are similar. Find the Value of a/b, if the scale factor is 2.
a = 2.8
b = 4.2
200
The sum of all interior angles in a triangle will always equal this number.
180^o
300
To "turn" a figure.
Rotation
300
Dilations always produce ___________ figures.
similar
300
If the scale factor is greater than 1 (ex:2) then the dilated image is ______________ from the original figure.
Enlarged
300
Congruent figures are _____ similar.
(sometimes, always)
always
300
Similar or not similar?
Not similar - angles are not the same.
400
Describing a rotation requires these three things.
1) Center (Point)
2) Rotation angle (Degrees)
3) Direction (Clockwise or Counterclockwise)
400
Dilations need these two things.
1) Center Point of Dilation
2) Scale Factor
400
If the scale factor is less than 1 (ex:1/4) then the dilated image is ____________ from the original figure.
Reduced
400
Similar figures are ____ congruent.
(sometimes, always)
sometimes
400
Find the scale factor. Figure EFGH is the original.
Scale factor = 2
500
Describing a dilation will always require these three things:
1. The coordinates of the vertices (points) of a shape
2. The scale factor
3. The coordinates of the center
500
How will dilating a figure with a scale factor of 1/3 change a figure? How many times bigger or smaller will it get?
It will make the figure 3 times smaller from the center of dilation.
500
Dilations can result in a congruent figure if their scale factor is this number.
1
500
These two triangles are similar. Find the missing side lengths.
s=12
t=15
500
What is the value of X and Y when the scale factor is 1/4?
X= 32 (8x4)
Y= 9 (36x1/4) or (36/4)
600
What is the scale factor of this dilation:
3
600
Describe this dilation:
This is a reduction. The center of dilation is (0,0) and the scale factor is 1/5. *Double points for naming the original coordinate points!*
600
Describe this dilation:
This is an enlargement. The center is at (-5, 1) and the scale factor is 3. *Double points for naming the vertices!*
600
What is the scale factor for this reduction?
1/2
600
Are honey possums, possums? ...And do they eat honey?
No! They aren't possums and they don't eat honey. They are DELIGHTFULLY ADORABLE THOUGH!! 