Question

cum se calculeaza lungimea liniei mijlocii a unui trapez stiind ca lungimele bazelor sund de 15cm,20cm?

Answer 1

$Linia_{mijlocie}=\frac{B+b}{2}=\frac{15+20}{2}= \frac{35}{2} =17,5 cm.$

Answer 2

$L.m.= \frac{B+b}{2}= \frac{20+15}{2}= \frac{35}{2}=17,5~cm. \\ L.m.=linie~mijlocie \\ B=baza~mare \\ b=baza~mica.$