Răspunsuri

2014-05-07T13:58:18+03:00


doua unghiuri sunt complementare daca fac impreuna 90*

 "             "           "  suplementare       "          "      "          180*

(90-x)/(180-x)=1/4

x fiind unghiul

4(90-x)=180-x

3x=180

x=60*