SOLUTION: how do you find the perimeter of a triangle with the following coordinates A(-4,-1), B(4,5), C(4,-2)

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Question 497139: how do you find the perimeter of a triangle with the following coordinates A(-4,-1), B(4,5), C(4,-2)
Answer by cleomenius(959) About Me  (Show Source):
You can put this solution on YOUR website!
You will need to use the distance formula to find the distances between all three points.
d = sqrt%28%28x2+-+x1%29%5E2+%2B+%28y2+-+y1%29%5E2%29%29
AB = sqrt%28%284+-+-+4%29%5E2+%2B+%285+-+-+1%29%5E2%29%29
AB =sqrt%28%288%29%5E2+%2B+%286%29%5E2%29%29
AB = sqrt%28100%29%29
AB = 10
BC = sqrt%28%284+-+4%29%5E2+%2B+%28-2+-+5%29%5E2%29%29
BC = sqrt%28%280%29%5E2+%2B+%28-7%29%5E2%29%29
BC = sqrt%28-7%29%5E2%29%29
BC = sqrt%2849%29%29
BC = 7
AC = sqrt%28%284+--4%29%5E2+%2B+%28-2+--1%29%5E2%29%29
AC = sqrt%28%288%29%5E2+%2B+%28-1%29%5E2%29%29
AC = sqrt%2865%29%29
AC = 8.06
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To find the perimeter, you will add up the three sides
10 + 7 + 8.06 = 25.06.
Cleomenius.