Calcule o valor do ângulo â:
(â+6°/â+9°/â/â+3°)
a) â=20°
b) â=27°
c) â=18°
d) â=25°
e) â=15°
![Calcule O Valor Do Ângulo  Â6â9ââ3a Â20b Â27c Â18d Â25e Â15 class=](https://pt-static.z-dn.net/files/ddb/663d624329d48bb351b537c92104c0e4.jpg)