Answer:
2.50x+7.00=10.00+4.00x
Step-by-step explanation:
13-gon
The sum of the interior angles of a polygon with n sides is:
S = 180° (n − 2)
If S = 1980°, then:
1980° = 180° (n − 2)
11 = n − 2
n = 13
it is the 3 one
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