Mathematics - I am preparing for my Mathematics exam on Euclidean Geometry. What theorems can I be asked to prove?

The theorems you can be asked to prove in Grade 12 are the Proportion Theorem (a line parallel to one side of a triangle divides the other two sides proportionally), the Converse of the Proportion Theorem, Similar Triangles (equiangular triangles are similar), and the Pythagorean Theorem. You must state the theorem clearly, provide a labelled diagram, and give a reason for every step in your proof.