SOLUTION: what is the perimeter of a triangle with these points: (-1,2),(4,-2), (2,-2). I am using the distance formula but not coming up with the right answer.

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Question 429982: what is the perimeter of a triangle with these points: (-1,2),(4,-2), (2,-2). I am using the distance formula but not coming up with the right answer.
Answer by ewatrrr(10682) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

D = sqrt+%28%28x%5B1%5D-x%5B2%5D%29%5E2%2B%28y%5B1%5D-y%5B2%5D%29%5E2%29%29

(-1,2),

(4,-2),  D = sqrt%28%28-5%29%5E2+%2B+4%5E2%29 = sqrt(34)

(2,-2).  D = sqrt%282%5E2+%2B+0%29 = 2

(-1,2),  D = sqrt%283%5E2+%2B+%28-4%29%5E2%29 = sqrt(25) = 5

 P = 7+ sqrt(34) = 12.83 units