anonymous
  • anonymous
Determine whether the figures are similar. If so, determine the scale factor
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
myininaya
  • myininaya
|dw:1438909408931:dw|
mathmate
  • mathmate
Hint: If the figures are similar, then the corresponding sides are in proportion, i.e. (longer side of image)/(longer side of preimage)=(shorter side of image)/(shorter side of preimage)=

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More answers

anonymous
  • anonymous
i got 2.33333 and 2.5
myininaya
  • myininaya
if those aren't the same number then they aren't similar
myininaya
  • myininaya
if those were the same number then they would be similar
anonymous
  • anonymous
a. yes; scale factor = 2/5 b. yes; scale factor = 9/21 c. yes; scale factor = 3/7 d. no
myininaya
  • myininaya
well we just said 2.3333 was not the same as 2.5
anonymous
  • anonymous
d?
myininaya
  • myininaya
yep! :)
anonymous
  • anonymous
thankss
myininaya
  • myininaya
np
myininaya
  • myininaya
and I love the way @mathmate put it
anonymous
  • anonymous
can you help me with a few more?
myininaya
  • myininaya
i can try
anonymous
  • anonymous
Quadrilateral WXYZ has the following vertices: W (2,3) X (1,1) Y (3,0) Z (5,2)
anonymous
  • anonymous
myininaya
  • myininaya
Does the question say what it is looking for?
myininaya
  • myininaya
Like are they looking for the object being reflected about some line?
anonymous
  • anonymous
Select the correct graph of the figure & its image after a transformation 180 degrees about the origin.
myininaya
  • myininaya
when you think 180 deg think a half turn let's look at just Z in the first picture... |dw:1438910171720:dw| does the angle formed here look like 180 deg?
myininaya
  • myininaya
remember you should a straight line something like this: /, \, |, or _
myininaya
  • myininaya
|dw:1438910341194:dw|
myininaya
  • myininaya
do you see why?
myininaya
  • myininaya
it has to be a line that is not a line it it didn't have that little pointy thing at the bottom we would be golden
myininaya
  • myininaya
let's look at the second graph and you can tell me what you think I will graph just the Z points again
myininaya
  • myininaya
|dw:1438910446622:dw| the third graph |dw:1438910583808:dw| last graph |dw:1438910636536:dw| which graph shows a straight line from Z to Z'?
anonymous
  • anonymous
last one
myininaya
  • myininaya
agreed! straight lines have 180 deg angles
anonymous
  • anonymous
right!
myininaya
  • myininaya
also a neat little trick if a point has been rotated 180deg about the origin the point (A,B) becomes (-A,-B)
myininaya
  • myininaya
if you notice Z was (5,2) in that one pic and Z' was (-5,-2) in that one pic you chose
anonymous
  • anonymous
okay, so the answer is z?
myininaya
  • myininaya
the answer is the last picture or whatever choice this is http://assets.openstudy.com/updates/attachments/55c4007ee4b0f6bb86c3c83e-blueeyes13-1438909865901-44.jpg
anonymous
  • anonymous
Thank you so much
myininaya
  • myininaya
np
myininaya
  • myininaya
have a good day @BlueEyes13 :)
anonymous
  • anonymous
same to you :D

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