Question

what is the formula for finding how long a line is? Like for example: how far away is (-3,4) from (5,4)?

Answer 1

its the pythag thrm really,

the distance is the hypotenuse of a right triangle

Answer 2

d^2 = (x-x0)^2 + (y-y0)^2

Answer 3

d^2 = (-3-5)^2 + (4-4)^2

d^2 = 64

d = sqrt(64) = 8

Answer 4

the other way is to notice this is a flat line that goes from -5 to 3 and so is just 8 units long