imagine a right triangle
anyway
eqiaotn fo the distance betwen the points (x1,y1) and (x2,y2) is
\(D= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\)
distance bewteen A and B is disatnce bewteen (9,8) and (1,2)
notice increments of 2
\(D= \sqrt{(9-1)^2+(8-2)^2}\)
\(D= \sqrt{(8)^2+(6)^2}\)
\(D= \sqrt{64+36}\)
D=√100
D=10
distance is 10 units
