What is the measure of a regular 50-gon?

By measure, I will assume you mean what is each interior angle, or what is the sum of the interior angles. The sum is 8,640 degrees, and each interior angle is 172.8 degrees. Side fact: that means there is an exterior angle of only 7.2 degrees. A polygon with 1000 sides would have an exteror angle of only 0.46 degrees. However, and this makes sense, no matter how many sides in the polygon, the interiOS angle will not add up to 180.