Respuesta :

amna04352

Answer:

C) 80°

Step-by-step explanation:

8x + (4x + 60) = 180

Supplementary angles

12x + 60 = 180

12x = 120

x = 10

Angle GEC: 4(10) + 60 = 100

Angle BEC = 180 - 100 = 80

(Supplementary angles)

Hi1315

Answer:

[tex]8x + 4x + 60 = 180 \\ 12x = 180 - 60 \\ 12x = 120 \\ \frac{12x}{12} = \frac{120}{12} \\ x = 10 \: degrees[/tex]

supplementary angles.

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