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#### 2 and 3
The sum of the interior angles of a polygon is 1620 degrees. How many sides does the polygon have?
The formula for the sum of interior angles is:
180(n - 2) = 1620
n - 2 = \frac{1620}{180} = 9
n = 11
#### 11
### Question 11
A circle has a circumference of \( 31.4 \) meters. What is its radius? (Use \( \pi \approx 3.14 \))
Circumference formula: