M = a + b 2 {\displaystyle M={\frac {a+b}{2}}}
d = | a − b | {\displaystyle d=|a-b|}
M = ( x 1 + x 2 2 , y 1 + y 2 2 ) {\displaystyle M={\Big (}{\frac {x_{1}+x_{2}}{2}},{\frac {y_{1}+y_{2}}{2}}{\Big )}}
d = ( x 2 − x 1 ) 2 + ( y 2 − y 1 ) 2 {\displaystyle d={\sqrt {(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}}}
M = ( x 1 + x 2 2 , y 1 + y 2 2 , z 1 + z 2 2 ) {\displaystyle M={\Big (}{\frac {x_{1}+x_{2}}{2}},{\frac {y_{1}+y_{2}}{2}},{\frac {z_{1}+z_{2}}{2}}{\Big )}}
d = ( x 2 − x 1 ) 2 + ( y 2 − y 1 ) 2 + ( z 2 − z 1 ) 2 {\displaystyle d={\sqrt {(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}+(z_{2}-z_{1})^{2}}}}
