Răspuns:
Explicație pas cu pas:
a= AD
b= DE
c= EB
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(a,b,c) d.p. ( 2,3 ,15)
a/2=b/2=c/15= K.............K= CONSTANTA DE PROPORTIONALITATE
a/2=k→a=2K
b/3=K→b=3K
c/15=K→c= 15K
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2K+3K+15K=120
20K=120
K= 120:20
K= 6
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a= 2k=2*6=12 ( AD)
b= 3K=3*6=18 ( DE)
c= 15K=15*6=90 (EB)
