The sum of the degrees of any regular polygon with number of sides n is equal to (n - 2) x 180. Therefore, the sum of the internal angles in a decagon is equal to (10 - 2) x 180 = 1440 degrees.
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There are 1440 degrees in a decagon.
1440 degrees
1440
all decagons have 1440 degrees
A decagon is a 10 sided polygon. Exterior degrees total 360 Interior degrees total 1440