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Calculati aria unui romb ABCD stiind ca AB=10m si AC=12m

Răspuns :

AC=diag.⇒AO=6 cm,inΔABO,cu m(ung.O)=90 grade⇒AB²=BO²+AO²⇔100=36+BO²⇒BO=√100-36⇔BO=√64⇔BO=8⇒
Aromb=(8·6)÷2=48÷2=24cm²