anonymous
  • anonymous
ABCD is a parallelogram. If m
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
jim_thompson5910
  • jim_thompson5910
Rule: adjacent angles of any parallelogram are supplementary. That means they add to 180 degrees
jim_thompson5910
  • jim_thompson5910
So C+D = 180

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jim_thompson5910
  • jim_thompson5910
Now let's say C = 90 degrees. That would make D = 90 degrees. If D were to increase to something like D = 120, then what happens to C?
anonymous
  • anonymous
c would decrease?
jim_thompson5910
  • jim_thompson5910
yes C would go from C = 90 to C = 60
jim_thompson5910
  • jim_thompson5910
before: C = 90, D = 90 .... C+D = 90+90 = 180 after: D = 120, C = 60 ... C+D = 60+120 = 180
anonymous
  • anonymous
oooh thank you that makes more sense! I was not sure if they were supplementary at first
jim_thompson5910
  • jim_thompson5910
no problem

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