Please study the following problems related to geometry.

1. http://online-judge.uva.es/p/v103/10310.html

2. http://online-judge.uva.es/p/v101/10180.html

3. http://online-judge.uva.es/p/v101/10195.html

4. http://online-judge.uva.es/p/v101/10136.html

5. http://online-judge.uva.es/p/v101/10167.html

6. http://online-judge.uva.es/p/v102/10215.html

7. http://online-judge.uva.es/p/v102/10209.html

8. http://online-judge.uva.es/p/v100/10012.html