Two quarters of a circle.

A circle subdivided into two quarters and one half.

Two sevenths of a circle.

Two sixths of a circle.

Two tenths of a circle.

Two thirds of a circle.

A circle subdivided into two thirds and two sixths.

Two twelfths of a circle.

A whole circle.

1/10 of a 10 sided polygon

2/10 of a 10 sided polygon

3/10 of a 10 sided polygon

4/10 of a 10 sided polygon

5/10 of a 10 sided polygon

6/10 of a 10 sided polygon

7/10 of a 10 sided polygon

8/10 of a 10 sided polygon

9/10 of a 10 sided polygon

10/10 of a 10 sided polygon

10/10 of a 10 sided polygon with one piece detached

1/11 of a 11 sided polygon

2/11 of a 11 sided polygon

3/11 of a 11 sided polygon

4/11 of a 11 sided polygon

5/11 of a 11 sided polygon

6/11 of a 11 sided polygon

7/11 of a 11 sided polygon

8/11 of a 11 sided polygon

9/11 of a 11 sided polygon

10/11 of a 11 sided polygon

11/11 of a 11 sided polygon

11/11 of a 11 sided polygon with one piece detached

1/12 of a 12 sided polygon

2/12 of a 12 sided polygon

3/12 of a 12 sided polygon

4/12 of a 12 sided polygon

5/12 of a 12 sided polygon

6/12 of a 12 sided polygon

7/12 of a 12 sided polygon

8/12 of a 12 sided polygon

9/12 of a 12 sided polygon

10/12 of a 12 sided polygon

11/12 of a 12 sided polygon

12/12 of a 12 sided polygon

12/12 of a 12 sided polygon with one piece detached

1/3 of a 3 sided polygon

2/3 of a 3 sided polygon

3/3 of a 3 sided polygon

3/3 of a 3 sided polygon with one piece detached

1/4 of a 4 sided polygon

2/4 of a 4 sided polygon

3/4 of a 4 sided polygon

4/4 of a 4 sided polygon