Was only able to figure out a small portion, all the internal angles of the shape should be 1260/9 = 140 but couldn't progress further
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The formula for calculating the size of an interior angle is: interior angle of a polygon = sum of interior angles ÷ number of sides. The sum of exterior angles of a polygon is 360°. The formula for calculating the size of an exterior angle is: exterior angle of a polygon = 360 ÷ number of sides.
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