Question

In reperul cortizon xoy se considera punctele
A(2,4) B(2,1).
Calculați distanță de la A la punctul B

Answer 1

$A(2,4),B(2,1) \\ \\AB= \sqrt{( x_{B} -x_{A})^{2}+( y_{B} -y_{A})^{2}} \\ \\AB= \sqrt{(2-2)^{2}+(1-4)^{2}} \\\\AB= \sqrt{9}\\\\AB=3 u$

Answer 2

|AB|=|4-1|=3
am neglijat coordonatele pe y, deoarece yA=yB
as simple as that!!!