anonymous
  • anonymous
Please check my answer Triangle ABC has been dilated to form triangle AꞌBꞌCꞌ.What is the scale factor?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
i think it is 2/5 once simplified
anonymous
  • anonymous
@igreen
anonymous
  • anonymous
@radar

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anonymous
  • anonymous
@Kainui
anonymous
  • anonymous
@TheSmartOne
anonymous
  • anonymous
@ganeshie8
ganeshie8
  • ganeshie8
simply take the ratio of sides of image and preimage : \[\large \dfrac{7.5}{3}\]
anonymous
  • anonymous
yes , I did and simplified I got 2/5
anonymous
  • anonymous
I did the 7.5/3...3/7.5...becomes 2/5
ganeshie8
  • ganeshie8
you did it in reverse
ganeshie8
  • ganeshie8
7.5/3 should be 5/2
ganeshie8
  • ganeshie8
\[\large \dfrac{7.5}{3} = \dfrac{75}{30} = \dfrac{5}{2}\]
anonymous
  • anonymous
I did it like this one... Pre-image ABCD was dilated to produce image AꞌBꞌCꞌDꞌ. What is the scale factor of the similar figures? Enter the answer in simplest form. Two quadrilaterals labeled A B C D and A-prime, B-prime, C-prime, D-prime. Quadrilateral A B C D is larger than the other quadrilateral, which is to the right of quadrilateral A B C D. Side B C is labeled twelve, and side B-prime, C-prime is labeled nine.
anonymous
  • anonymous
anonymous
  • anonymous
it was explained to me that I needed to reverse the numerator and the denominator .... now confused :{
ganeshie8
  • ganeshie8
just a convention always put the "image" side on top
anonymous
  • anonymous
ok... so i need to go back and fix the other as well then or it will be incorrect?.
ganeshie8
  • ganeshie8
whats your answer for the other one with quadrilateral ?
anonymous
  • anonymous
simplified 3/4.... but that was doing the switching thing bc I originally had 4/3
ganeshie8
  • ganeshie8
3/4 is correct.
anonymous
  • anonymous
ok, but what is the reason I flip the one and not the other? I just want to make sure I understand it
ganeshie8
  • ganeshie8
no wait, in the first question, the bigger triangle is image, yes ?
anonymous
  • anonymous
let me reread it
anonymous
  • anonymous
it reads as if the ABC is the original and the other is the dilation
anonymous
  • anonymous
if it is image on top the the first would be 12/9 simplified to 4/3
ganeshie8
  • ganeshie8
|dw:1433344043799:dw|
anonymous
  • anonymous
kk
ganeshie8
  • ganeshie8
Image = final picture after dilation preimage = original picture before dilation
anonymous
  • anonymous
and the image or original is the numerator the copy the denominator right?
ganeshie8
  • ganeshie8
again, image is final picture after dilation
ganeshie8
  • ganeshie8
preimage is original picture before dilation
anonymous
  • anonymous
no I said it wrong meant to say it the other way... now I am confusing myself...lol
ganeshie8
  • ganeshie8
for first question 5/2 is correct for second question 3/4 is correct
anonymous
  • anonymous
Just seems as if it should be the other way around :) I got it now. I just need to pay close attention to which one is the original and which is the copy. I think if I look at it that way vs. image/pre-image I get it a bit better.
ganeshie8
  • ganeshie8
actually scaale factor = pre-image/image makes more sense
ganeshie8
  • ganeshie8
because you can get the dimensions of image by simply multiplying the original dimensions by scale factor
anonymous
  • anonymous
and always put the original on top and copy on bottom right?
ganeshie8
  • ganeshie8
always put image on top original on bottom
ganeshie8
  • ganeshie8
you just need to do couple of problems before seeing why it makes sense
anonymous
  • anonymous
ok,ok, I got this now :) Thank you. sometimes it is the smallest of things that trip me up but it just takes putting it in to a way my brain accepts the info without twisting it...yay for dyslexia...again thank you :)
ganeshie8
  • ganeshie8
this trips everyone in the start, things will make sense by practice eventually
anonymous
  • anonymous
tyvvm!

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