Corrugated plastic is a cost-effective lightweight material that is used in many applications including signage, screen printing, outdoor billboards, packaging, cake bases, and more. Corrugated plastic can be easily cut and has the ability to be flexed and bent without cracking or breaking. It is the number choice for sign makers because of the durability and the weight-saving, but still, impact resistant compared to noncorrugated plastic materials. It is waterproof, withstand harsh weather, and stain resistant. You can easily wipe it clean using water. The equilateral triangle will measure from side to side (width). Your height will correspond to the width.