Question

un dreptunghi are laturile egale cu 5 cm si 12 cm. Aflati lungimea diagonalei.

Answer 1

$L=12 \ cm \\ l=5 \ cm \\ d^2=L^2+l^2 \\ d^2=12^2+5^2 \\ d^2=144+25 \\ d^2=169 \\ d=\sqrt{169} \\ \boxed{d=13 \ cm}$