Regular Nonagon Angle Measurement
Regular nonagon is a polygon with nine equal sides and nine equal angles. To find the measure of angles in a regular nonagon, we need to follow these steps:

Step 1: Calculate the Total Sum of Interior Angles
- The formula to find the total sum of interior angles in any polygon is (n-2) * 180 degrees, where n is the number of sides.
- For a regular nonagon, n = 9
- Total sum of interior angles = (9-2) * 180 = 7 * 180 = 1260 degrees

Step 2: Find the Measure of Each Angle
- Since a regular nonagon has nine equal angles, we divide the total sum of angles by the number of angles.
- Measure of each angle = Total sum of angles / Number of angles = 1260 / 9 = 140 degrees
Therefore, each angle in a regular nonagon measures 140 degrees. This means that all nine angles in a regular nonagon are equal and each angle measures 140 degrees.