What is the perimeter of a triangle on a graph with these coordinates: x = (0,3), y = (3,-1), z = (-7,-1)

Answer 1

Hi Denese,

Perimeter is the distance around the triangle, so we can use the distance formula. It works like this:

Distance between (0,3) and (3,-1):

sqrt[(0-3)² + (3-(-1))²]

= sqrt[9 + 16]

= sqrt[25]

= 5

Between (3,-1) and (-7,-1):

sqrt[(3-(-7))² + (-1-(-1))²]

= 10

Between (0,3) and (-7,-1):

sqrt[(0-(-7))² + (3-(-1))²]

= sqrt(65)

= 8.1

Total perimeter = 5 + 10 + 8.1 = 23.1

Please let me know if I can be more helpful, thanks!

Joe