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Foundations of Math 12 Unit 9 Send-in Assignment On-Line Course 7. Complete the chart for these semi-regular tessellations. The first tessellation has been completed for you as an example. SKETCH OF SEMI-REGULAR TESSELLATION VERTEX CONFIGURATION INTERIOR ANGLE MEASURES AND SUM 3, 3, 3, 4, 6 60° + 120° + 60° + 120° + 120° = 360° 5 marks 8. 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: 3 marks Unit 9 - Constructions and Fractals

          Foundations of Math 12
Unit 9 Send-in Assignment
On-Line Course
7. Complete the chart for these semi-regular tessellations. The first tessellation has been completed for
you as an example.
SKETCH OF SEMI-REGULAR
TESSELLATION
VERTEX CONFIGURATION
INTERIOR ANGLE
MEASURES AND SUM
3, 3, 3, 4, 6
60° + 120° + 60° + 120° +
120° = 360°
5 marks
8. 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:
3 marks
Unit 9 - Constructions and Fractals

Foundations of Math 12
Unit 9 Send-in Assignment
On-Line Course
7. Complete the chart for these semi-regular tessellations. The first tessellation has been completed for
you as an example.
SKETCH OF SEMI-REGULAR
TESSELLATION
VERTEX CONFIGURATION
INTERIOR ANGLE
MEASURES AND SUM
3, 3, 3, 4, 6
60° + 120° + 60° + 120° +
120° = 360°
5 marks
8. 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:
3 marks
Unit 9 - Constructions and Fractals

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