Writing Equations And Graphing Circles Page 4
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1
2
3
4Homework
4 .3
W riting
E quations
&
G raphing
C ircles
( Page
2 )
Solutions
Sketch
t he
c ircle
a nd
i dentify
t he
c enter
&
r adius.
!
!
11.
! − 3
+ ! − 2
= 9
Center:
( 3,
2 )
Radius:
3
Write
t he
s tandard
e quation
o f
t he
c ircle
a nd
s tate
t he
c enter/radius.
!
!
12.
!
+ !
− 8! + 7 = 0
!
!
! − 4
+ !
= 9
Center:
( 4,
0 )
Radius:
3
!
!
13.
!
+ !
+ 4! − 6! − 3 = 0
!
!
! + 2
+ ! − 3
= 16
Center:
( -‐2,
3 )
Radius:
4
!
!
14.
2 !
+ 2!
− 16! + 4! + 20 = 0
!
!
! − 4
+ ! + 1
= 7
Center:
( 4,
-‐ 1)
Radius:
7
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