Question

Calculate the distance between the points k=(-1,-1) and H=(3,-9)

Answer 1

Explanation:

`d^2=(x_2-x_1)^2+(y_2-y_1)^2\\ \\ d^2=(3- -1)^2+(-9- -1)^2\\ \\ d^2=4^2+(-8)^2\\ \\ d^2=16+64\\ \\ d^2=80\\ d=√(80)\\ \\ d=4√(5)\\ \\ d\approx 8.9`

Answer 2

the distance is:
`√(80)`

Explanation:

We use he distance formula:

distance =
`√((-9 + 1)^2+(3+1)^2)=√(64+16) =√(80)`