SOLUTION: triangle QRS has vertices at Q(2,6),R(-3,1), and S(6,2). determine the perimeter of the triangle. i just need help how to do it. thnxs

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Question 720981: triangle QRS has vertices at Q(2,6),R(-3,1), and S(6,2). determine the perimeter of the triangle. i just need help how to do it. thnxs
Found 2 solutions by josgarithmetic, fcabanski:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
Distance formula to find QR, RS, and QS; and then find the sum of those segment lengths.
Answer by fcabanski(1391)   (Show Source): You can put this solution on YOUR website!
The perimeter of a triangle is the sum of the side lengths. The distance formula gives the distance between points on a coordinate plane. The distance between pairs of points (vertices) in a triangle is the side length.


The distance formula is the square root of the difference between the y values squared plus the difference between the x values squared.


d=


The triangle has three sides: QR, RS and SQ. Find the lengths of those sides, then add them to find the perimeter.


QR length = d =


RS length = d =


SQ length = d =


Their sum is approximately 21.78

Hope the solution helped. Sometimes you need more than a solution. Contact fcabanski@hotmail.com for online, private tutoring, or personalized problem solving (quick for groups of problems.)

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