Răspunsuri

2014-05-01T17:11:04+03:00
AB/AC=4/3=K
AB=4K
AC=3K
k=constanta
aplici Pitagora 30²=4k²+3k²
16k²+9k²=900
25k²=900
k²=36
k=6
ab=24
AC=18
A=AB*AC/2=24*18/2=216