Răspuns: [tex]\bf Aria~_{rama} = 2760~cm^{2}[/tex]
Explicație pas cu pas:
Salutare!
[tex]\color{red}\boxed{\boxed{\bf Aria_{patrat}=\ell^{2},~unde~\ell - latura~patratului}}[/tex]
[tex]\it~~~[/tex]
[tex]\bf Aria~_{rama} = Aria~_{patrat~rama~exterioara}- Aria~_{patrat~rama~interiora}[/tex]
[tex]\bf Aria~_{rama} = 143^{3} - 133^{2}[/tex]
[tex]\boxed{\boxed{\bf Aria~_{rama} = 2760~cm^{2}}}[/tex]
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