Răspunsuri

2014-08-20T07:49:06+03:00
A,b,c,d -masuril  unghiurilor

a,b,c,d    dp cu   11,15,21,25

a/11=b/15=c/21=d/25=k

a=11k
b=15k
c=21k
d=25k

11k+15k+21k+25k=360
72k=360
k=5

a=11*5=55 grade
b=15*5=75 grade
c=21*5=105 grade
d=25*5=125 grade