Question

Stiind ca punctele A(-1;4) si B(5;2),Calculati lungimea segmentului AB

Answer 1

[tex]AB= \sqrt{( x_{2}-x_{1})^2+( y_{2}-y_{1})^2 } \\ unde \\ A(x_{1},y_{1}) B(x_{2},y_{2}) \\ AB= \sqrt{(5+1)^2+(2-4)^2}} = \sqrt{6^{2}+(-2)^{2}} = \sqrt{36+4} = \sqrt{ 40}=2 \sqrt{10} [/tex]