anonymous
  • anonymous
Someone please please help me with this geometry quesiton
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
what is the image of the point (-5,-9) reflected across the y-axis
DanJS
  • DanJS
flipping over the y-axis will change the sign on the x coordinate
anonymous
  • anonymous
so the answer will be (5,-9)?

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More answers

DanJS
  • DanJS
graph it and see
DanJS
  • DanJS
yeah, flip means 'perpendicular to' the y-axis
DanJS
  • DanJS
for a single point
anonymous
  • anonymous
aha... and how about this.. what is the image of the point (-2,-4) relfected across the line y = x
DanJS
  • DanJS
reflecting something perpendicularly over y=x, also called the inverse if it exists
DanJS
  • DanJS
|dw:1449190874361:dw|
DanJS
  • DanJS
here, the signs change on both y and x
anonymous
  • anonymous
i see I understand now :) !!!
DanJS
  • DanJS
sorry , forget that
anonymous
  • anonymous
oh
DanJS
  • DanJS
it looks like this, perpendicular to th eline y=x
DanJS
  • DanJS
|dw:1449191063013:dw|
DanJS
  • DanJS
just change y and x around
anonymous
  • anonymous
so (2,4)?
DanJS
  • DanJS
|dw:1449191178658:dw|
DanJS
  • DanJS
any point reflected over the line y=x, just change x and y like that
DanJS
  • DanJS
graph the points (1,1) (-1,1) (-1,-1) (1,-1) notice reflecting from one to the other over each axis, how the signs change
DanJS
  • DanJS
you good on that, or
anonymous
  • anonymous
ok so the answer is (-4,-2)
DanJS
  • DanJS
reflection over x-axis --- change sign on y coordinate reflection over y-axis ----change sign on x coordinate reflection over y=x -----swap coordinates (y,x)
anonymous
  • anonymous
yes ok
anonymous
  • anonymous
i think i go tit
DanJS
  • DanJS
draw that square with those 4 points, that helps see it
DanJS
  • DanJS
gl
anonymous
  • anonymous
can you help me with one mreo
DanJS
  • DanJS
ok
anonymous
  • anonymous
it says name the vertices of the image of trangle ABC reflected across the x axis
DanJS
  • DanJS
same exact idea, just have to do 3 points
anonymous
  • anonymous
oh
DanJS
  • DanJS
|dw:1449191595162:dw|
DanJS
  • DanJS
notice , all the x coordinates stay the same, all the y coordinates change sign
anonymous
  • anonymous
let me attach a photot
DanJS
  • DanJS
k brb
anonymous
  • anonymous
ok
anonymous
  • anonymous
1 Attachment
DanJS
  • DanJS
k,
DanJS
  • DanJS
yeah, for each of those points, change the sign on the y
DanJS
  • DanJS
C from 2,-1 to 2,+1)
DanJS
  • DanJS
A goes to (2, +4) B goes to (6, +4) draw the new triangle
anonymous
  • anonymous
c is 3,-1
DanJS
  • DanJS
sorry yeah, just change sign on the y term for each
DanJS
  • DanJS
name the reflected points A' , B', and C'
anonymous
  • anonymous
oh yay i got it :)
DanJS
  • DanJS
k, goodluck
anonymous
  • anonymous
thank :)

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