It has 8 sides - it is an octagon (either regular or irregular, convex or concave).
The formula for the sum of interior angles of an n-sided polygon is 180(n-2)
1080 = 180 (n-2)
6 = n-2
n = 8
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A 10 sided polygon which is a decagon and its interior angles add up to 1440 degrees.
The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees. 1980 degrees.
The sum of the interior angles of any polygon of n sides is equal to 180(n - 2) degrees.
The 3 interior angles of any triangle add up to 180 degrees
The total for the interior angles depends on the number of sides. The formula for the total of interior angles of an n-sided polygon is sum =180(n-2). This is 180 degrees for triangles, 360 degrees for quadrilaterals, and 540 degrees for pentagons.