### Polygon Presentation

Transcript: Acute Angles Polygon Presentation Convex AND Concave This is a nonagon with 5 acute angles, because an acute angle is less than , and it has five of them. This is an asymmetric nonagon because you aren't able to just pick a vertice/spot, draw a line straight across, and have the two sides be the same. Here are three examples of nonagons in real life! Regular AND Irregular Ending My Polygon... This is a nonagon with 9 reflexive angles, since a reflexive angle is any angle that is larger than 180 , but is less than 360 . My polygon is the nonagon. The nonagon has 9 sides. Therefore, it also has 9 angles. 140 / Obtuse By Ella Lichtenberg This is a nonagon with a right angle, since a right angle is , and it has one. The Nonagon Seminole Badge Interior Angle Sum of The Nonagon This is a regular nonagon because it doesn't have any of the qualites that an irregular nonagon has and yet it has the qualities of a normal nonagon. Symmetric AND Asymmetric This is a convex nonagon because there are no indents in it and it doesn't look like it has been cut out of. This is a nonagon with 9 obtuse angles, since an obtuse angle is any angle that is larger than 90 but less than 180 , and this nonagon has 9 of those. Thanks for Watching! Nonagons with Obtuse AND Reflexive Angles This is a concave nonagon since it has a large indent in it and it looks as if it was cut out of but it still has nine sides. The Nonagon Nonagons with Right AND Acute Angles Hong Kong $5.00 Coin This is an irregular nonagon because it is concave and has some other qualities that only irregular nonagons do, and it doesn't have any of the qualities of a regular nonagon even though it has nine sides since that doesn't really count. Equation: (Sides-2)180 = Interior Angle Sum OR Equation: (Sides-2)*180 = Interior Angle Sum OR Equation: (9-2)180 = 1,260 OR Equation: (9-2)*180 =1,260 Symmetry 220 / Reflexive This is a symmetric nonagon because at any vertice or spot on the nonagon you can draw a line straight across and both sides with be the same. Bottom of a Cup To find the interior angle sum of a nonagon, you simply need to subtract 2 from the number of sides, and then multiply that number, 7, by 180 to get the interior angle sum. So, the interior angle sum of a nonagon is 1,260 . Nonagons in Real Life Have a Great Rest of Your Day!