[tex]Dlugosc~~odcinka~~o~~koncach~~w~~punktach~~A=(x_{1} ,y_{1} ),~~B=(x_{2} ,y_{2} )~~wyraza~~sie~~wzorem:\\\mid AB\mid =\sqrt{(x_{2} -x_{1} )^{2} +(y_{2} -y_{1} )^{2} } \\\\gdy~~A=(-7,3),~~B=(-2,3)~~to:\\\\\mid AB \mid =\sqrt{(-2-(-7))^{2} +(3-3)^{2} } =\sqrt{(-2+7)^{2} } =\sqrt{5^{2} } =5\\\\Odp: F[/tex]
