Question

what is the distance between A(-8,4) and B(4,-1)?

Answer 1

use the distance formula to get


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


d = sqrt((4-(-8))^2+(-1-4)^2)


d = sqrt((4+8)^2+(-1-4)^2)


d = sqrt((12)^2+(-5)^2)


d = sqrt(144+25)


d = sqrt(169)


d = 13



So exact distance between the two points is 13 units.