Răspunsuri

2014-04-07T17:29:52+03:00
Linia mijlocie in trapez= \frac{b+B}{2} = \frac{6,(3)+9,(3)}{2} =(6 \frac{3}{9} + 9\frac{3}{9})* \frac{1}{2}  = (\frac{19}{3} + \frac{28}{3})* \frac{1}{2}= \frac{47}{6}