Page 8 - PowerPoint Presentation

EXAMPLE 4 :

Find the equation of the circle having AB as diameter

where A is the point (1,8) and B is the point (3,14).

Solution :

Let (h,k) be the centre of a circle radius r,

Given A (1,8) and B (3,14)

2
AB  3 1  14 8   2

 2  2 6 2

 40

 2 10

2 10
radius, r   10
2