Rigid Transformations
Dilations 1
Dilation 2
Similarity
Random
100
To "flip" a figure over a line
Reflection
100
True or False? Dilations always make a figure smaller.
False
100
Is a dilation of 7/5 an enlargement or reduction?
Enlargement (Gets bigger)
100
Give the dimensions of another rectangle that is similar to these two rectangles.
100
When drawing dilations, what points have to be on rays from the center of dilation?
The corresponding vertices or corners of a figure.
200
To "slide" a figure.
Translation
200
A dilation might change the size of a figure's side lengths but never the _______.
angles or shape
200
What transformations can be used to prove similarity.
List them all!
1) Translations
2) Rotations
3) Reflections
4) Dilations
200
Point A has the coordinates (4, -3). What is the scale factor used if the new coordinates are (2, - 3/2)?
Scale factor = 1/2 or 0.5
200
Complete the sentence. Corresponding sides of similar figures are ______________________
Proportional
300
To "turn" a figure clockwise or counter clockwise
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
When we describe a translation we need to be sure to say:
1) Direction
2) Distance
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 rotation requires these three things.
1) Center (Point)
2) Rotation angle (Degrees)
3) Direction (Clockwise or Counterclockwise)
500
If a square is dilated using a scale factor of 2, how many times larger will the area of the new square be?
4 times larger
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
A point has the coordinates (8, -2). What are the new coordinates after a dilation using a scale factor is 1/4 and the origin as the center of dilation?
(2, -0.5)