Question

Find the distance between the points (1, 5) and (1, -4).

Answer 1

For this you need to use the distance formula

Answer 2

what is the distance formula

Answer 3

\[D=\sqrt{(x _{2}-x _{1})^2+(y _{2}-y _{1})^2}\]

Answer 4

So now you can plug in your values

Answer 5

\[D=\sqrt{(1-1)^2+(-4-5)^2}\]

Answer 6

Now just simplify

Answer 7

\[D=\sqrt{81}\]

Answer 8

D=9

Answer 9

And that's your answer @chrismatias

Answer 10

do you want to learn how to derive the distance formula from pythagorean theorem?