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Un segment cu lungimea de 45 cm se imparte in 5 segmente proportionale cu nr. 1,2,3,4,5. Determina lungimile secmentelor.

Răspuns :

pai 45:5=9deci fiecare segment are cate 9 cm
1 segment are 3 cm 
2 segment are 6 cm 
3 segment are 9 cm 
4 segment are 12 cm 
5 segment are 15 cm 
3+6+9+12+15=45