Question

un dreptunghi cu lungimea 12. cm si latimea 6 da se afle diagonala dreptunghi ului

Answer 1

$d^2=L^2+l^2 \\ d^2=12^2+6^2 \\ d^2=144+36 \\ d^2=180 \\ d= \sqrt{180}=6 \sqrt{5}cm$

Answer 2

12cm×2+6cm×2=24cm+12cm=36cm