Since we want to find the distance between two points, we use the distance formula.
[tex]d = \sqrt{(x_1 - x_2)^{2} + (y_1 - y_2)^{2}}[/tex]
[tex]= \sqrt{(9 - 6)^{2} + (12 - 2)^{2}}[/tex]
[tex]= \sqrt{3^{2} + 10^{2}}[/tex]
[tex]= \sqrt{9 + 100}[/tex]
[tex]= \sqrt{109}[/tex]
[tex]\approx 10.4u[/tex]
Thus, the distance is approximate 10.4 units