\beta = {12}^{0} \\ \\ \alpha = {180}^{0} - {12}^{0} = {168}^{0} " alt=" \alpha = {180}^{0} - \beta \\ \alpha = 7( \beta + \beta ) \\ \\ 14 \beta = {180}^{0} - \beta \\ 15 \beta = {180}^{0} = > \beta = {12}^{0} \\ \\ \alpha = {180}^{0} - {12}^{0} = {168}^{0} " align="absmiddle" class="latex-formula">
Ответ этот угол
