A triangle with vertices (3,1), (-2, 3) and (-1, -1) exists. Without graphing it, is this triangle a right triangle? Explain why.

Question

A triangle with vertices (3,1),  (-2, 3) and (-1, -1) exists. Without graphing it, is this triangle a right triangle? Explain why.

anonymous · Answer

you need to have one of these points that have slope

-1
 --
  m

anonymous · Answer

that will be a perpendicular line 
vertical

anonymous · Answer

I don't understand what either of you mean.

emilylauren · Answer

find the slopes between all the  points, you should end up with 3 slopes

emilylauren · Answer

if it was a right triangle one slope would be the opposite reciprocal of the other. For example, if one slope was 2/5 and another was -5/2 it would be a right triangle. If none are like this, it is not a right triangle.

emilylauren · Answer

the three slopes are: -2/5, -4, and 1/2. Not a right triangle.

emilylauren · Answer

She asked if it was a RIGHT triangle, obviously three points make a triangle (unless they are along the same line).