Each interior angle of a regular 9 sided shape measures 140 degrees
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Providing it is a regular nonagon: Exterior angle: 40 degrees Interior angle: 140 degrees
Each interior angle measures 140 degrees
Each interior angle measures 140 degrees
Each interior angle measures 140 degrees
A nonagon has 9 sides. It can have one or more 90 degree angles. If it is a regular nonagon then it has 180*7/9 for the interior angle measures which is 140 degrees.