1. What are the corner angles of a regular enneagon? If you put a regular enneagon and an equilateral triangle together as shown, what regular polygon fits in the gap? Explain (show how you determined this).
2. It is well-known that the only regular polygons which tessellate the plane (using only one shape) are the triangle, square, and hexagon. Which of these three polygons are self-similar and which are not? Draw examples to justify your answer.
   

marks 10. It is well-known that the only regular polygons which tessellate the plane (using only one shape) are the triangle, square, and hexagon. Which of these three polygons are self-similar and which are not? Draw examples to justify your answer. 3 marks8. What are the corner angles of a regular enneagon? If you put a regular enneagon and an equilateral triangle together as shown, what regular polygon fits in the gap? Explain (show how you determined this). Gap enneagon corner angle: Missing polynomial: Version 2019 Page 6 of 6