30
A/3=B/4=C/5=D/6= (proportiiderivate)=9A+B+C+D)/(3+4+5+6)=360°/18=20°
A=3*20°=60°
B=4*20°=80°
C=5*20°=100°
D=6*20°=120°
as simple as that!! (mai ales dac nu punweai poza sucita)
5) inseamna ca suntr d.p. cu inversele lor si anume 3;4;8;9
A/3=B/4=C/8=D/9=(A+B+C+D)/(3+4+8+9)=360°/24=15°
A=45°
B=60°
C=120°
D=135°
4) ceva cudesen...vezi atasament e posibil sa fi gresit vreo valoare la calcul, am facut mental
dar tii cont desuma mas. unghiurilor unui triunghi side suma mas.ugh. unui patrulater convex
