Let's join these two points so that they make a right triangle. The distance between these points will be the hypotenuse of the right triangle. The legs will be 8 - (-1) = 9 and 5 - (-8) = 13. Now, using the Pythagorean Theorem, we can find the hypotenuse. We have 9² + 13² = c² (c is the hypotenuse). When we solve for c, we get c = 5√10. Hope this helps!
