Question

In reperul cartezian xOy se considera punctele A(1,1),B(4,1),C(4,4).Aratati ca AB=BC.

Answer 1

$AB= \sqrt{( x_{2}- x_{1} )^2+( y_{2}- y_{1})^2 }= \sqrt{(4-1)^2+(1-1)^2}= \sqrt{9}=3 \\ BC= \sqrt{((4-4)^2+(4-1)^2}= \sqrt{9}=3 \\ AB=BC=3$

Answer 2

yA=yB⇒AB=|1-4|=3

xB=xC⇒BC=|1-4|=3
deci AB=BC
C.C.T.D. as simpe as that!!!
dat la BAC tehnologic acum vreo3-4 ani ::::)))
un DESEN cu 1⇄1cm ar ajuta fffff mult