Distance and Midpoint Review

$AB=\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}$

$AB=\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2$

$AB=\sqrt{\left(x_2-x_1\right)+\left(y_2-y_1\right)}$

$AB=\left(x_2-x_1\right)+\left(y_2-y_1\right)$

Vertical Angles Theorem

Pythagorean Theorem

Supplements Theorem

Perpendicular Bisector Theorem

 $\sqrt{20}$  units

 $\sqrt{13}$  units

 $5$  units

 $\sqrt{61}$  units

$M\left(\frac{x-y}{2}\right)\text{}$

$M\left(\frac{x+y}{2}\right)$

$M\left(\frac{x_2-x_1}{2}\ ,\ \frac{y_2-y_1}{2}\right)$

$M\left(\frac{x_1+x_2}{2}\ ,\ \frac{y_1+y_2}{2}\right)$

 $\left(-1,-3\right)$  

 $\left(1,3\right)$  

 $\left(-2,-6\right)$  

 $\left(2,6\right)$  

 $S\left(-2,0\right)$  

 $S\left(-2,-4\right)$  

 $S\left(4,6\right)$  

 $S\left(4,8\right)$