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
What does it mean for two figures to be similar?
They have the same shape but not necessarily the same size; corresponding angles are equal and side lengths are proportional.
100
Point A (2,3) becomes A' (10,15) after dilation.
What is the scale factor?
5
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
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
A triangle has sides 6, 8, 10.
A similar triangle has sides 3, 4, x.
Find x.
5
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
Ms. V drinks what every morning?
Tea
400
Describing a translation requires these two things.
1) Direction
2) Distance
400
What is a scale factor?
The number that tells how much a figure is enlarged or reduced.
400
If the scale factor is less than 1 (ex:1/4) then the dilated image is ____________ from the original figure.
Reduced
400
What must be true about corresponding angles in similar figures?
They are equal.
400
what does texas tech do at kick-off every football game?
throw tortillas
500
List all of the algebraic rules for rotations around the origin. ie. (x, y) --> ( x, y) (360 degree rotation)
(x, y) --> ( x, y) 360 rotation
(x, y) --> ( -x, -y) 180 rotation
(x, y) --> (y, -x) 90 clockwise/270 counter clockwise
(x, y) --> (-x,y) 90 counter clockwise/270 clockwise
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
what is Ms. V's cat's name?
Cassie
Sassy Cassie
Gangster Cassie
PSSt Psst
Fatty