Question

In the coordinate plane, what is the length of the line segment that connects points at (5, 4) and (−3, −1) ?

Answer 1

To find the length of a line between two points with known x- and y- coordinates, use:
sqrt((change in x)^2 + (change in y)^2),
which I know may look confusing but it isn't really:

sqrt((5 - -3)^2 + (4 - -1)^2)
= sqrt(8^2 + 5^2)
= sqrt(64 + 25)
= sqrt(89)

Answer 2

The Answer is 9.43 Hope this helps :D