Question

What is the distance between point A(-1,3) and B(2,-1)

Answer 1

sqrt(13)

Explanation:

The distance between 2 points is given by

d = sqrt(x2-x1)^2 + (y2-y1) ^2 )

= sqrt((-1-2)^2 + (3-1)^2 )

= sqrt( -3^2 +2^2)

= sqrt(9+4)

= sqrt(13)