anonymous
  • anonymous
The coordinates of rectangle ABCD are A(-8, 6), B(-2, 6), C(-2, 3), D(-8, 3). What are the coordinates of the point of intersection of the diagonals of the rectangle after the rectangle is reflected across the x-axis? (5, 1.5) (5, 4.5) (-5, -4.5) (-5, 1.5)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@jim_thompson5910 can you help me
jim_thompson5910
  • jim_thompson5910
First find the midpoint of segment AB
jim_thompson5910
  • jim_thompson5910
Do you know how to do that?

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anonymous
  • anonymous
yes
jim_thompson5910
  • jim_thompson5910
so what is the midpoint of AB
anonymous
  • anonymous
(-5,6)
jim_thompson5910
  • jim_thompson5910
now find the midpoint of BC
jim_thompson5910
  • jim_thompson5910
and tell me what you get
anonymous
  • anonymous
0,4.5
jim_thompson5910
  • jim_thompson5910
you should have gotten (-2,4.5)
jim_thompson5910
  • jim_thompson5910
now call the midpoint of AB point M call the midpoint of BC point N
anonymous
  • anonymous
ohh i subtracted the first one instead of adding my bad
jim_thompson5910
  • jim_thompson5910
the diagonals will cross at the point that has the x coordinate of M and the y coordinate of N So the diagonals will cross at (-5,4.5)
anonymous
  • anonymous
but thats not one of the choices
jim_thompson5910
  • jim_thompson5910
oh, you have to reflect it over the x axis, so the y coordinate will flip in sign and become -4.5
jim_thompson5910
  • jim_thompson5910
so the intersection of the diagonals is (-5,-4.5)

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