3420°
explanation:
the equation of the sum of interior angles are (n-2)x180
polygon above has 21 sides so you sub n as 21 and plug the equation in the calculator
243 because if you divide and subtract it would culminate to the amount of people
Answer:
Step-by-step explanation:
1/2x-33/2=1/2(x-33)
Answer:
Step-by-step explanation:
Answer:

Step-by-step explanation:

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