Question

Aflati masurile unghiurilor unui patrulater convex , stiind ca sunt direct proportionale su numerele 7,8,9 si 12

Answer 1

a+b+c+d=360
a=7k
b=8k
c=9k
d=12k

7k+8k+9k+12k=360
36k=360
k=10

a=7*10 = 70 grade
b=8*10 = 80 grade
c=9*10 = 90 grade
d=12*10 = 120 grade

Answer 2

Notez cu a,b,c si d masurile unghiurilor patrulaterului convex;
a+b+c+d=360°
{a,b,c,d} d.p.{7,8,9,12};
a/7=b/8=c/9=d/12=(a+b+c+d)/(7+8+9+12)=
360/36=10=>a=7×10=70°;
b=8×10=80°;
c=9×10=90°;
d=12×10=120°;