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DAU COROANA! AVETI IN POZA TOT.

DAU COROANA AVETI IN POZA TOT class=

Răspuns :

DE||BC => tr. ADE ~ tr. ABC

[tex] \frac{AD}{AB} = \frac{DE}{BC} [/tex]

[tex] \frac{7}{14} = \frac{6}{BC} [/tex]

7BC=14×6

7BC=84 /÷7

BC=12

[tex] \frac{DE}{BC} = \frac{6}{12} = \frac{1}{2} [/tex]