ratedloco
ratedloco ratedloco
  • 25-04-2017
  • Mathematics
contestada

If triangle ABC with vertices A(-2, -5), B(-3, 2), and C (1, -2) a right triangle?

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ghanami
ghanami ghanami
  • 25-04-2017
hello :
A(-2, -5), B(-3, 2), and C (1, -2) 
calculate : AB² , AC² ,BC²
 AB² = ( -3  +2   )² +  ( 2  +5  )² =50
AC² = ( 1  +2  )² +  ( -2  +5   )²  =18
BC² = (  1 +3  )² +  ( -2  - 2  )²  = 32
by petagor rule  :  AB² =  AC² + BC²....(ABC is a right triangle in : C )
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