Question

Calculati lungimea laturii AB A(3,0) B(0,4).

Answer 1

Răspuns:

AB =

$\sqrt{(0 - 3)^{2} + (4 - 0) {}^{2} } = \sqrt{( - 3)^{2} + {4}^{2} } = \\ \sqrt{9 + 16} = \sqrt{25} = 5 \: cm$