The pointy edges of petals rely on a type of geometric feedback never before seen in nature.

A prism is a 3D shape with a constant polygon shaped cross-section. A prism is named by the shape of its polygon cross-section. When the cross-section is a triangle, the prism is called a ...

Irregular polygons are shapes that have sides and angles of different sizes. You can always identify the polygon by how many sides it has. For example a pentagon is always a shape that has 5 sides.