Question

va rog ajutați-mă repede, rezolvare + desen va rog dau coroana ​

Answer 1

$\it \hat{A}=\dfrac{3}{7} \hat{B}\ \ \ \ \ (1)\\ \\ \\ \hat{A}=180^o- \hat{B}\ \ \ \ \ (2)\\ \\ \\ (1),\ (2) \Rightarrow \dfrac{3}{7}\hat{B}=180^o- \hat{B}|_{\cdot7} \Rightarrow 3 \hat{B}=1260^o-7\hat{B}|_{+7\hat{B}}\ \Rightarrow 10\hat{B}=1260^o\Rightarrow\\ \\ \Rightarrow\hat{B} =126^o\\ \\ \hat{C}=180^o-\hat{B}=180^o-126^o=54^o$