For this case we have:
By trigonometric property we have:

Where:


Substituting:

Clearing x we have:

Thus, the equation is:
Answer:

It's 5/6 because out of six sections, there are 5 that aren't green.
<h2><u><em>
ITS D</em></u></h2>
Answer:
c . Two angles whose sum is 180°
Step-by-step explanation:
Hope it helps you in your learning process