Răspuns :

Dianageorgiana794id

Răspuns:

P=2(L+l)

l=3L/7

300=2(⁷⁾L+3L/7)

300:2=10L/7

150·7=10L=>L=1050:10=>L=105cm

l=105·3:7=>l=45cm

A=L·l

A=105·45=>A=4725cm²

Rubenserbanid

Răspuns:

l=3L/7

300=2(⁷⁾L+3L/7)

300:2=10L/7

150·7=10L=>L=1050:10=>L=105cm

l=105·3:7=>l=45cm

A=L·l

A=105·45=>A=4725cm²

Explicație pas cu pas:

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