Respuesta :

Answer:

x=20

Step-by-step explanation:

We know that a line is 180 degrees, and the base of the cemi-circle is a line. So,  we would have:

x+7x+x=180

9x=180

x=20

Hope this helps!!

fnej

Answer:

x = 20

Step-by-step explanation:

x + 7x + x = 180

9x = 180

x = 20

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