Question

un teren in forma de trapez are aria de 700 m patrati.daca inaltimea trapezului este de 20 m,atunci suma bazelor este....? 

Answer 1

[tex]A_{trapez}= \frac{(B+b)*h}{2} \\ \\ Inlocuim: \\ \\ 700= \frac{(B+b)*20}{2} \\ \\ B+b=700:\frac{20}{2} \\ \\ B+b=700:10 \\ \\ B+b=70~cm[/tex]