Find the number of side of a regular polygonif ech of its interiorangle measure 140 degree

If the interior angle measures 140 degrees then the exterior angle will measure 40 degrees since the sum of interior and exterior angles measures 180 degrees. And since the sum of all exterior angles is 360 degrees, therefore the number if sides is 360/40=9 Therefore the answer to your question is 9 sides.
I would be gratified if you read the above mentioned points and get some knowledge about the properties of interior and exterior angles from it. If you like my answer then please give an upvote and if you have any other questions then please do not hesitate and post in this same thread or in a different thread.
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