Infinite Precalculus - Day 1 - Circles/Ellipses Worksheet
[Pages:6]Acc. Precalculus - Unit 2 - Conics
Name___________________________________
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Day 1 - Circles/Ellipses Worksheet
Date______________________ Period________
Use the information provided to write the standard form equation of each circle.
1) Center: (10, -5)
Radius: 5
2) Center: (11, 7)
Radius: 38
3) Center: (10, 0)
Radius: 8
4) Center: (-7, 3)
Radius: 6 2
5) Center: (14, -12) Point on Circle: (18, -14)
6) Center: (-14, 1) Point on Circle: (-13, 1)
7) Ends of a diameter: (4, 8) and (-8, 14)
8) Ends of a diameter: (9, 18) and (11, 0)
Identify the CENTER, VERTICES, CO-VERTICES, FOCI, LENGTH OF MAJOR AND MINOR AXIS and the ECCENTRICITY of each.
(x - 2)2 ( y + 10)2
9)
+
= 1
49
64
(x - 2)2 ( y - 7)2
10)
+
= 1
81
49
Worksheet by Kuta Software LLC
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( )17 2
x + 2
( y + 10)2
11)
+
= 1
144
81
Plot the CENTER and RADIUS of each. Then sketch the graph.
12) (x - 4)2 + ( y - 1)2 = 5
y 8
6
4
2
13) x2 + ( y - 3)2 = 9
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
14) x2 + y2 = 30
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
15) x2 + ( y + 2)2 = 4
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
Worksheet by Kuta Software LLC
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Sketch the graph. Plot the CENTER, FOCI, VERTICES and CO-VERTICES.
(x - 2)2 y2
16)
+ =1
4 49
y 8
6
4
2
(x - 1)2 ( y + 2)2
17)
+
= 1
36
9
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
x2 ( y + 2)2
18) +
= 1
30 10
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
Worksheet by Kuta Software LLC
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19) (x - 2)2 + ( y - 4)2 = 1
9
y 8
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
Worksheet by Kuta Software LLC
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Answers to Day 1 - Circles/Ellipses Worksheet
1) (x - 10)2 + ( y + 5)2 = 25
2) (x - 11)2 + ( y - 7)2 = 38
3) (x - 10)2 + y2 = 64
4) (x + 7)2 + ( y - 3)2 = 72
5) (x - 14)2 + ( y + 12)2 = 20
6) (x + 14)2 + ( y - 1)2 = 1
7) (x + 2)2 + ( y - 11)2 = 45
8) (x - 10)2 + ( y - 9)2 = 82
9) Center: (2, -10)
10) Center: (2, 7)
Vertices: (2, -2), (2, -18)
Vertices: (11, 7), (-7, 7)
Co-vertices: (9, -10), (-5, -10)
Co-vertices: (2, 14), (2, 0)
Foci: (2, -10 + 15), (2, -10 - 15)
Foci: (2 + 4 2, 7), (2 - 4 2, 7)
Major Axis: 16 units
Major Axis: 18 units
Minor Axis: 14 units
Minor Axis: 14 units
15
Eccentricity:
? 0.484
8
( ) 17
11) Center: - , -10 2
( ) ( ) 7
41
Vertices: , -10 , - , -10
2
2
( ) ( ) 17
17
Co-vertices: - , -1 , - , -19
2
2
( ) ( ) 6 7 - 17
-6 7 - 17
Foci:
, -10 ,
, -10
2
2
Major Axis: 24 units
Minor Axis: 18 units
42
Eccentricity:
? 0.629
9
12)
y 8
Center: (4, 1)
Radius: 5
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
7 Eccentricity: ? 0.661
4
13)
y 8
Center: (0, 3)
Radius: 3
6
4
2
14)
y 8
Center: (0, 0)
Radius: 30 6
4
2
15)
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
y 8
Center: (0, -2)
Radius: 2
6
4
2
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
16)
-8 -6 -4 -2 -2 -4 -6 -8
2 4 6 8x
y 8
Center: (2, 0) Vertices: (2, 7)
6
(2, -7)
4
Co-vertices: (4, 0)
2
(0, 0)
Foci: (2, 3 5)
-8 -6 -4 -2
2 4 6 8 x (2, -3 5)
-2
-4
-6
-8
Worksheet by Kuta Software LLC
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17) 19)
y 8
Center: (1, -2) Vertices: (7, -2)
6
(-5, -2)
4
Co-vertices: (1, 1)
2
(1, -5)
Foci: (1 + 3 3, -2)
-8 -6 -4 -2
2 4 6 8 x (1 - 3 3, -2)
-2
-4
-6
-8
y 8
Center: (2, 4) Vertices: (2, 7)
6
(2, 1)
4
Co-vertices: (3, 4)
2
(1, 4)
Foci: (2, 4 + 2 2)
-8 -6 -4 -2
2 4 6 8 x (2, 4 - 2 2)
-2
-4
-6
-8
18)
y 8
Center: (0, -2)
Vertices: ( 30, -2)
6
(- 30, -2)
4
Co-vertices: (0, -2 + 10)
2
(0, -2 - 10)
Foci: (2 5, -2)
-8 -6 -4 -2 2 4 6 8 x -2
(-2 5, -2)
-4
-6
-8
Worksheet by Kuta Software LLC
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