The equation for the total interior angles of a polygon is (n-2)x180. In this case, the shape has 56 sides. Thus, to work out the total interior angles of the shape you do:
(56-2)x180
=54x180
=9,720.
Therefore the total interior angles for a 56 sided shape is 9,720.
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The total sum of angles of an n-sided shape is (n-2)x180o Hence, the angles in a five sided shape add up to (5-2)x180o = 3 x 180o = 540o
If you're talking a plane ie 2-dimensional figure, then like ALL four sided shapes, the interior angles total 360 degrees.
To find the sum of the interior angles of any polygon, you can use the formula (n-2) * 180 degrees, where n is the number of sides. For a 39-sided polygon, the sum of the interior angles would be (39-2) * 180 = 37 * 180 = 6660 degrees. Since all the interior angles of a polygon are equal, you can divide the total sum by the number of angles to find the measure of each interior angle. In this case, each interior angle of a 39-sided polygon would measure 6660 / 39 = 170.77 degrees.
The sum of the interior angles of any n-sided plane figure is (2n-4) right angles. In your case n = 4 so sum is 4 right angles ie 360 degrees.
Assuming it is regular, the total degrees of an n-sided polygon = 180(n-2) = 2700. 2700/17 = 158.23 degrees