What is the distance between point j and point kJ point is -4 -7 k's point is 2 1?

Answer 1

djk = [ ( xj - xk )^2 + ( yj - yk )^2 ]1/2

djk = [ ( 2 - -4 )^2 + ( 1 - -7 )^2 ]^1/2

djk = [ ( 6 )^2 + ( 8 )^2 ]^1/2

djk = [ 36 + 64 ]^1/2 = [ 100 ]^1/2 = 10 <--------------

Answer 2

The idea here is to calculate the difference between the x-coordinates, as well as the difference between the y-coordinates of both points, then use the Pythagorean Theorem.