## Geometry: Common Core (15th Edition)

Use the distance formula to find AB. $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ $d=\sqrt{(-2-4)^2+(3-(-1))^2}$ $d=\sqrt{(-6)^2+(4)^2}$ $d=\sqrt{(36+16}$ $d=\sqrt{52}$ $d=7.2$ The distance from the midpoint is half the distance from A to B. $MB=\frac{AB}{2}=\frac{7.2}{2}=3.6$