Question

Calculati masurile unghiurilor unui patrulater convex, stiind ca sunt direct proportionale cu 3,4,5 si 6

Answer 1

A/3=B/4=C/5=D/6= (A+B+C+D/(3+4+5+6)= 360/ 18= 20°
 
              ⇵
∡A=3*20°=60° ; ∡B=4*20°=80° ; ∡C=5*20°=100°  si  ∡D=6*20°=120° .

Proba:  60+80+100+120=360°