anonymous
  • anonymous
If a quadrilateral is a parallelogram, then __________. (I do not believe B makes sense, because I always thought opposite sides were congruent) A. its opposite angles are supplementary B. its consecutive sides are congruent C. its consecutive angles are congruent D. its consecutive angles are supplementary
Mathematics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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jim_thompson5910
  • jim_thompson5910
`I always thought opposite sides were congruent` you are correct
anonymous
  • anonymous
Does that apply to angles too or just sides?
jim_thompson5910
  • jim_thompson5910
Parallelogram ABCD |dw:1438746905152:dw|

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jim_thompson5910
  • jim_thompson5910
Properties: opposite sides are congruent: AB = CD, AD = BC opposite angles are congruent: A = C, B = D |dw:1438746982052:dw|
jim_thompson5910
  • jim_thompson5910
adjacent angles (aka consecutive angles) are supplementary A + B = 180 B + C = 180 C + D = 180 D + A = 180
jim_thompson5910
  • jim_thompson5910
more properties are listed here https://en.wikipedia.org/wiki/Parallelogram
anonymous
  • anonymous
At first I said that C was the answer, "its consecutive angles are congruent" but that was wrong
jim_thompson5910
  • jim_thompson5910
example of a particular parallelogram |dw:1438747395131:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1438747418593:dw|
anonymous
  • anonymous
120+60 = 180. Consecutive angles are supplementary ?
jim_thompson5910
  • jim_thompson5910
correct

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