Greatthinker2000 Greatthinker2000
  • 01-11-2017
  • Mathematics
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musiclover10045
musiclover10045 musiclover10045
  • 01-11-2017

calculate the slopes

3-0 / -2 - 2 = 3/-4 = -3/4

3 - -4 / -2 - -1 = 7/-1 = -7/1

0 - -4 / 2 - -1 = 4/3


-3/4 and 4/3 are negative reciprocals so this is a right triangle


Answer is A

 

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