140 degrees
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140 degrees.
Each interior angle of a regular nonagon measures 140 degrees.
It's impossible to tell, unless it's a regular nonagon. All we're sure of isthat all nine of them total up to 360 degrees.If it happens to be a regular nonagon, then each one is 40 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.
A nine sided shape that is called a regular nonagon.