Question

in reperul cartezian xOy se considera punctele A(1,1) B(4,1) si C(4,4). aratsati ca AB egal cu BC

Answer 1

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

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