Polygons

A polygon is a plane figure that is formed by three or more segments called sides. Each side intersects exactly two other sides at each of its endpoints. Each endpoint is a vertex of the polygon.

My phone is a quadrilateral

This bag is a quadrilateral with small dodecagons (shapes with 12 sides)

This is a foam sponge, also a triangle

The scarf has, like, a ton of snowflakes with even more sides

The "F" on the book is a nonagon 

My "M" room letters are dodecagons