Respuesta :

rosariocordova62

Answer:

finding the area of the triangle of the exterior angle

Step-by-step explanation:

2x° (3×-12) (4×+9)

36° 36°

2x +36° + 36° = 108°

2x

___+36°__

72

72

__+36°__

108°

so the answer is 108°

hoped i helped

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