A **hexadecagon** is a sixteen-sided polygon. Hexadecagons are very popular in art and architecture.

Concave hexadecagons (also called 8-pointed stars) are very famous in different religions and cultures. Concave Hhexadecagons can be in many different shapes. Here are three examples.

Let's explore these hexadecagons.

- Measure the side length of each.
- Can you find the areas of each shape by using the blue unit square?
- If the area of the green shape is A, express the others in terms of A.
*(Hint: you may try to drag the hexadecagons on top of each other to compare their areas.)*

Using this canvas, create your own design for tiles and use them to create tilings;