Question

How many units apart are the points (8, 11) and (-1, -1)?

Answer 1

use distance formula. do you know what the formula is?

Answer 2

Isn't it the Pythagorean theorem? I know that, I just don't know how to use it.

Answer 3

it is pythagoras exactly

Answer 4

pythagorean theorem? sort of \[\sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}\] and it's pythagoras?

Answer 5

from -1 to 8 is 9 units
from -1 to 11 is 12 units. so
\[d^2=9^2+12^2\] and therefore
\[d=\sqrt{9^2+12^2}\]

Answer 6

Is it 225?

Answer 7

Using Pythagoras

Answer 8

It's 15*