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Unit 8, Activity 1, Working with Circles with Answers
Blackline Masters, Advanced Math – PreCalculus
Page
Louisiana Comprehensive Curriculum, Revised 2008
251
1.
Write both the standard and general form of an equation of the circle given the
following information.
a) the center at (2, 3) and radius is equal to 4
()
xy
x
y
x
y
−+
+=
+
−
+
−
=
23
1
6
4
6
3
0
22
2
2
and
b) the center at (4, 2) and the circle passing through (1, 7)
x
y
x
y
−=
+
−
+
−
=
42
3
4
4
6
3
0
2
2
and
c) the endpoints of the diameter of the circle are (1, 5) and (3, 7)
x
y
x
y
++
+++−=
1
1
40
2
2
38
0
b
g
b
g
and
d) the center is at (2, 5) and the circle is tangent to the line x = 7.
x
y
x
y
+
−
−
−
=
2
5
8
1
841
4
0
bg
and
2. Each of the problems below are equations of semicircles. For each one find
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 Fall '08
 GERMAN
 Calculus, PreCalculus

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