Euclidean Geometry

1.  Previous knowledge and circle terminology

2.  Theorem 1

3.  Theorem 2

4.  Theorem 3

5.  Theorem 4

6.  Theorem 5 and 6

7.  Theorem 7

8.  Theorem 8

9.  Theorem 9

10.  Solving problems

11. Proving a cyclic quadrilateral

12.  Proving a tangent