Anything you like - between 0 and 360 degrees. The only thing that you can say is that the sum of all the interior angles will be (7-2)*180 = 5*180 = 900 degrees.
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Providing that it is a regular 7 sided polygon then each interior angle is 900/7 degrees
The heptagon (7 sided polygon) cannot tessellate. The exterior angle of the heptagon is 51.43 degrees which makes the interior angle 128.57 degrees.
A 7 sided shape is called a heptagon.
heptagon
To find the interior angle of a polygon, you can use the formula: (n-2) * 180 / n, where n is the number of sides. For a 9-sided polygon, the formula would be (9-2) * 180 / 9, which simplifies to 7 * 180 / 9 = 1260 / 9 = 140 degrees. Therefore, the interior angle of a 9-sided polygon is 140 degrees.