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aria unui trapez cu baza mica de 15cm baza mare de 7,2 si inaltimea de 4cm

Răspuns :

[tex]A= \frac{(B+b)*h}{2} =\ \textgreater \ A= \frac{(15+7,2)*4}{2} =\ \textgreater \ A= \frac{43,8}{2} =\ \textgreater \ A=21,9cm^2[/tex]