Find the equation of circle with center (0,0) and
radius 9
Answers
Answer:
The question doesn't make sense, you already now the centre and radius. Do you mean the equation of a circle with centre ( 0 ,0 ) and radius 9?
Explanation:
The equation of a circle is:
(
x
−
h
)
2
+
(
y
−
k
)
2
=
r
2
Where
h
and
k
are the coordinates of the centre and
r
is the radius.
From example:
h
=
0
,
k
=
0
and
r
=
9
so:
(
x
−
0
)
2
+
(
y
−
0
)
2
=
9
2
⇒
x
2
+
y
2
=
81
Answer link
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