Using the formula for sum of polygon interior angles, what would be the sum of the interior angles of an octagon?
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135 °
1080 °
1440 °
The sum of the interior angles of an octagon can be calculated using the formula: (n-2) * 180 degrees, where n is the number of sides of the polygon.
In this case, the octagon has 8 sides, so the sum would be (8-2) * 180 degrees = 6 * 180 degrees = 1080 degrees.
Therefore, the correct answer is 1080 °.