N-2 X 180= polygon total angles. Where N equals 15. That is (15-2)X180=2340 degrees.
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I think there are 13 triangles in a 15 sided shape.. Because for convex shapes (Pentagons) You take 2 from how many sides there are in the same. Like 5-2= 3 triangles.. I could be wrong!
The angles in a 15 sided polygon add up to 2340 degrees
The interiior angles of a 15 sided polygon add up to 2340 degrees
The interior angles of a 15 sided polygon add up to 2340 degrees
A 15 sided shape's total number of degrees can be found using the formula (x-2)*180, where x is the number of sides. Using this we find that a 15 sided shape's total degrees is 2340. Divide that number by 15 to get the degrees of each interior angle. It comes out to be 156 degrees.