Question

In an isometric transformation, the preimage and image must not __________.
A.
change size
B.
rotate
C.
preserve angle measures
D.
reflect across the x-axis
@H3LPN33DED @UsukiDoll @donmath1.2 @shanemc1010 @mathmate

Answer 1

D

Answer 2

I remembered what isometry is AND IT NOT D!

Answer 3

*IT IS NOT D!

Answer 4

Let's analyze the word "isometric".
iso = same
metric = measure.
So you can figure out what kind of transformation it is!

Answer 5

easy example for isometry
consider a square... what shape does it have if I rotate it 90 degrees clockwise?

Answer 6

if I rotate a square 90 degrees clockwise then _____________

Answer 7

it stays the same right?

Answer 8

think about dice. yes it does stay the same

Answer 9

a square rotated 90 degrees clockwise still retains the shape... I can rotate again and again and I will have that square

Answer 10

so it doesnt need to preserve angle measures?

Answer 11

no.. isometry preserves the shape of an object.

Answer 12

the isometric transformations are nuts though...depending on what you are being presented.

Answer 13

isometric transformations <- glide reflection, translation, rotation, reflection

Answer 14

I remember reflecting and rotating a LOT when I did isometric transformations

Answer 15

so based on what I wrote, which choices can we throw out?

Answer 16

A and B

Answer 17

We can throw out B because rotation is an isometric transformation...

Answer 18

there's one more answer choice that can be thrown out... remember what I wrote about the different isometric transformations ?

Answer 19

I mentioned that word twice.

Answer 20

D

Answer 21

yes... consider the b d p q letter

if I pick d then I can use vertical reflection
d b
and I have a b

Answer 22

so we are left with
A. change size
C. preserve angles

Answer 23

ok

Answer 24

This has something to do with the definition of Isometric Transformations.

I only gave the definition of Isometry and that's preserve it's shape..
Isometric Transformation definition, however, tells us more

AN Isometric Transformation is a transformation that preserves the distances and angles between an image and pre-image. In an Isometric Transformation the image is exactly the same size and shape as the pre-image.

Answer 25

do you see any terms that look familiar to your remaining choices?

Answer 26

It would be A

Answer 27

yup because a shape that changes size is a non-isometric transformation.

Answer 28

So a is correct

Answer 29

did i earn a medal

Answer 30

???

Answer 31

ok thanks

Answer 32

I want medals XD.

Answer 33

yay :D

Answer 34

me too

Answer 35

@mathmate can give you one... but you kind of stole my stuff x(

Answer 36

wait what just happened? *scrolls up*

Answer 37

no i stole googles stuff lol

Answer 38

O___________________________________o oh embarrassing XD
It's probably because you two are orange so my mind was focused on something else and then your colors blended in.

Answer 39

you know what's weird. When I did my modeling project, my professor said just replicate it... like write it in my own words. I asked if it was plagiarism or a rip off. He was like as long as I don't republish the article, then it's fine. What the heck?

Answer 40

@UsukiDoll :) thank you for your generosity. Your appreciation is sufficient!

Answer 41

I think rip offs are harder to find in Math because the result is the same whereas in English you can tell based on the sentence structure

Answer 42

true

Answer 43

Ok I need sleep way past my bed time night,