4D- Circles

Objectives: >Identify the general equation of circles >identify the centre (h,k) and the radius >sketch the circle relation >advanced: applying Complete the square method to factorise the circle relation Task 1: click here explore how the values of (h,k) influences the centre of the circle explore how the value 'r' influences the shape of the circle Task 2: click here What is the centre of this circle? what is the radius of this circle? Can you rewrite the relation into the general circle equation? What method could we use? Notes: