Page 1 - PowerPoint Presentation

8.1 Circles

y
P ( x , y )
Center ( h , k )

r

C( h , k ) x

0

The length of a radius , r  (x h)  (y  k) 2
2

Squaring both sides , we get

The Standard Form
2
2
(x h)  (y  k)  r 2
with center ( h , k )