Question

If point a is at (-1,2) and point b is at (11,-7), what is length of line ab?

Answer 1

Answer:

15

Step-by-step explanation:

Distance formula: $d=\sqrt{(x2-x1)^{2}+(y2-y1)^{2} }$

Plug in (-1,2) and (11, -7):

$d=\sqrt{(11-(-1)^{2}+(-7-2)^{2} } = d=\sqrt{(12)^{2}+(-9)^{2} }=\sqrt{144+81} = \sqrt{225} = 15$