Răspuns:
7. notezi a, b, c ,d unghiurile
a/2=b/5=c/7=d/10 = k
a= 2k
b=5k
c=7k
d=10k
2k+5k+7k+10k= 360 ( suma unghiurilor in patrulater = 360 )
24 k= 360 , k= 360 /24 = 15
a = 2k = 2·15 = 30
b=5k =5·15 = 75
c=7k =7·15 =105
d=10k=10·15 = 150
8. la fel a/1 =b/2=c/3=d/4 = k
a=k
b=2k
c=3k
d=4k
k+2k+3k+4k= 360
10k= 360 , k = 360/10 = 36
a= 36
b= 2·36=72
c=3·36=108
d=4·36=144
Explicație pas cu pas:
