| 11. | The two interior angles of a kite that are on opposite sides of the symmetry axis are equal.
|
| 12. | One interior angle in a regular triacontagon is 168? meaning that one exterior angle would be 12?
|
| 13. | The sum of the interior angles of any non-self-intersecting 257-gon is 91800?
|
| 14. | The sum of the interior angles of any non-self-intersecting 65537-gon is 23592600?
|
| 15. | The third, fourth and fifth are short and the sixth and seventh extending nearly to the interior angle.
|
| 16. | For example, no matter how a triangle is transformed, the sum of its interior angles is always 180?
|
| 17. | Equivalently, a convex quadrilateral is cyclic if and only if each exterior angle is equal to the opposite interior angle.
|
| 18. | This contradicts Proposition 16 which states that an exterior angle of a triangle is always greater than the opposite interior angles.
|
| 19. | Finally, tweak the interior angle at the vertex of the two shortest sides so it is slightly greater than 180?
|
| 20. | The sum of its interior angles ( two acute and two reflex ), as with any crossed quadrilateral, is 720?
|
