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Solução!
![A ~~soma~~ dos~~ angulos~~internos~~do~~\triangle{AHC}=180\º\\\\\\\
\boxed{\widehat{A}=70\º}\\\\\\\
A~~bissetris~~divide~~o~\^angulo~~em~~duas~~partes~~iguais.\\\\\\\\
Fazendo!\\\\\\\\
2x+30\º=70\º\\\\\\
2x=70\º-30\º\\\\\\\
2x=40\º\\\\\\\
x= \dfrac{40\º}{2}\\\\\\\
\boxed{x=20\º}](https://tex.z-dn.net/?f=A+%7E%7Esoma%7E%7E+dos%7E%7E+angulos%7E%7Einternos%7E%7Edo%7E%7E%5Ctriangle%7BAHC%7D%3D180%5C%C2%BA%5C%5C%5C%5C%5C%5C%5C%0A+%5Cboxed%7B%5Cwidehat%7BA%7D%3D70%5C%C2%BA%7D%5C%5C%5C%5C%5C%5C%5C%0AA%7E%7Ebissetris%7E%7Edivide%7E%7Eo%7E%5C%5Eangulo%7E%7Eem%7E%7Eduas%7E%7Epartes%7E%7Eiguais.%5C%5C%5C%5C%5C%5C%5C%5C%0AFazendo%21%5C%5C%5C%5C%5C%5C%5C%5C%0A2x%2B30%5C%C2%BA%3D70%5C%C2%BA%5C%5C%5C%5C%5C%5C%0A2x%3D70%5C%C2%BA-30%5C%C2%BA%5C%5C%5C%5C%5C%5C%5C%0A2x%3D40%5C%C2%BA%5C%5C%5C%5C%5C%5C%5C%0Ax%3D+%5Cdfrac%7B40%5C%C2%BA%7D%7B2%7D%5C%5C%5C%5C%5C%5C%5C%0A%5Cboxed%7Bx%3D20%5C%C2%BA%7D+ "A ~~soma~~ dos~~ angulos~~internos~~do~~\triangle{AHC}=180\º\\\\\\\
\boxed{\widehat{A}=70\º}\\\\\\\
A~~bissetris~~divide~~o~\^angulo~~em~~duas~~partes~~iguais.\\\\\\\\
Fazendo!\\\\\\\\
2x+30\º=70\º\\\\\\
2x=70\º-30\º\\\\\\\
2x=40\º\\\\\\\
x= \dfrac{40\º}{2}\\\\\\\
\boxed{x=20\º}")
Boa noite!
Bons estudos!
Solução!
Boa noite!
Bons estudos!
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