Question

Va rog sa ma ajutati repede ! Cum afli diagonala unui patrat daca sti aria acestuia de 72 dm patrati. Va rog frumos sa ma ajutati ! Dau coroana !

Answer 1

in 2 feluri
cel ai rapid, stii ca patratuleste si romb
deci
diag²/2=aria
diag²=2aria=2*72=144dm²
diag=√144=12dm

altfel, mai clasic:

 afil  latura=√latura²=√Arie=√72=6√2
 diagonala=latura*√2=6√2*√2=6*2=12dm

Answer 2

$A=l^2\ \textless \ =\ \textgreater \ 72=l^2=\ \textgreater \ l=6 \sqrt{2} dm\\\\ d=l \sqrt{2} =\ \textgreater \ d=12dm\\\\ d^2=(6 \sqrt{2} )^2+(6 \sqrt{2} )^2\\\\ d^2=72+72\\\\ d^2=144\\ d=12dm.$