Chapter 10 - Radical Expressions and Equations - Concept Byte - Distance and Midpoint Formulas - Page 605: 2

$d=5$ M$(4,2.5)$

$d=\sqrt {(x_2-x_1)^2+(y_2-y_1)^2}$ $d=\sqrt {(6-2)^2+(4-1)^2}$ $d=\sqrt {(4)^2+(3)^2}$ $d=\sqrt {16+9}$ $d=\sqrt {25}$ $d=5$ M$(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$ M$(\frac{2+6}{2},\frac{1+4}{2})$ M$(\frac{8}{2},\frac{5}{2})$ M$(4,2.5)$