7.4 Exercises
1. Prove the Corollary 7.8!
2. Prove the Corollary 7.9!
3. Draw in the plane with one
crossing!
4. Draw in the plane with three
crossing!
5. Draw in the plane with 9 crossing.
7.4 Exercises
1. Prove the Corollary 7.8!
2. Prove the Corollary 7.9!
3. Draw in the plane with one
crossing!
4. Draw in the plane with three
crossing!
5. Draw in the plane with 9 crossing.