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<span>D = 180 * (n -2)
D = 180n -360
180n = D +360
n = (D / 180) + 2
So, the answer is "A"
And we can test this with a square, sum of angles = 360
n = (D / 180) +2
n = (360 / 180) +2
number of sides = 4
correct
Source:
http://www.1728.org/polygon.htm
</span>
Answer:

Step-by-step explanation:
Algebra
The equation is shown without proper format, we'll assume the correct equation is like

Multiplying all the equation by (x-2)(x+2)

Operating

Rearranging and simplifying

Answer:
408
Step-by-step explanation:
The answer is like adding 34, 12 times. Example:
34+34+34+34+34+34+34+34+34+34+34+34=408
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