Check list:

  1. Revise earlier work on the necessary and sufficient conditions for polygons to be similar.
  2. Prove (accepting results established in earlier grades):
    * that a line drawn parallel to one side of a triangle divides the other two sides proportionally (and the Mid-point Theorem as a special case of this theorem);
    * that equiangular triangles are similar;
    * that triangles with sides in proportion are similar; and
    * the Pythagorean Theorem by similar triangles.

Learn the concepts:
Videos from learn.mindset.co.za
Mind Action Series: Mathematics 12 Textbook & Workbook (2013):
Revision Exercise Page 242
Exercise 1 Page 253
Exercise 2 Page 264
Exercise 3 Page 267
Exercise 4 Page 275
Exercise 5 Page 281
Exercise 6 Page 292
Exercise 7 Page 299
Exercise 8 Page 302
Revision Exercise Page 307
Some Challenges Page 314
Relevant sections in Everything Maths:

Practice the concepts: