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  1. What is a 13-sided polygon? - Homework.Study.com

  2. What is the measure of an exterior angle of a regular 13-sided …

  3. What is the sum of the measures of the interior angles of a 13 …

  4. In a 13 sided polygon, the sum of five angles is 1274 degree,four …

  5. What is the measure of an exterior angle of a regular 13-sided …

  6. Find the sum of the interior angle measures of a 13-gon

  7. In a 13-sided polygon, what is the sum of: a) the interior angles?

  8. 4-Sided Polygons | Overview & Shapes - Lesson - Study.com

  9. Angles in a Polygon | Measurement, Formula & Examples

  10. Rotational Symmetry & Reflection of Polygons - Lesson - Study.com