Check list:

  1. The equation \({\left( {x - a} \right)^2} + {\left( {y - b} \right)^2} = {r^2}\) defines a circle with radius \(r\) and centre \(\left( {a;b} \right)\).
  2. Determination of the equation of a tangent to a given circle.

Learn the concepts:
Videos from learn.mindset.co.za
Mind Action Series: Mathematics 12 Textbook & Workbook (2013):
Revision Exercise Page 217
Exercise 1 Page 220
Exercise 2 Page 223
Exercise 3 Page 228
Revision Exercise Page 229
Some Challenges Page 231
Relevant sections in Everything Maths:

Practice the concepts: