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Worksheets

Circles

Total questions: 10

Worksheet time: 22mins

Name
Class
Date
1.

What is the equation of the circle?

a)

(x+1)2 + (y +1)2 = 3

b)

(x+1)2 + (y -1)2 = 3

c)

(x+1)2 + (y +1)2 = 9

d)

(x-1)2 + (y -1)2 = 9

2.
Write the equation at the origin with radius 6.  
a)
x2 + y2 = 6
b)
x2 + y2 = 36
c)
x  + y = 6
d)
x + y = 36
3.

What is the center of a circle with equation  (x4)2+y2=5\left(x-4\right)^2+y^2=5  ?

a)
(-4, 0)
b)
(4, 0)
c)
(4, 1)
d)
(-4, 1)
4.
What is the radius of the circle with this equation of  (x-5)²+(y+7)²=8?
a)
4
b)
8
c)
4√2
d)
2√2
5.
Determine the center and radius: x+ y+ 14x - 2y = -1
a)
center= (-7,2) radius= 3
b)
center= (-7,1) radius= 7
c)
center= (-4,1) radius= 5
6.
Determine the equation of the circle in standard form: x+ y+ 6x - 12y + 20 = 0
a)
(x-3)2 + (y+6)2 = 25
b)
(x+3)2 + (y-6)2 = 25
c)
(x-3)2 + (y+6)2 = 45
d)
(x+3)2 + (y-6)2 = 5
7.
What is the equation of the circle, with center (4,2) and radius 5 units?
a)
(x + 4)2 + (y + 2)2 = 25
b)
(x + 4)2 + (y + 2)2 = 5
c)
(x - 4)2 + (y - 2)2 = 5
d)
(x - 4)2 + (y - 2)2 = 25
8.

Which graph correctly represents

x2 + (y - 6)2 = 9

a)

A

b)

B

c)

C

d)

D

9.

Transform  into the general equation or expanded equation form of a circle.

 (x+2)2+y2=100(x+2)^2+y^2=100 

a)

 x2+y2=10x^2+y^2=10 

b)

 x2+y2+4x96=0x^2+y^2+4x-96=0 

c)

 x2+y24y96=0x^2+y^2-4y-96=0 

d)

 x2+y24y+96=0x^2+y^2-4y+96=0 

10.

Find the equation of the circle that has centre  (2,1)\left(-2,-1\right)  and passes through the point  (2,0)\left(2,0\right) .

a)

 (x2)2(y1)2=17\left(x-2\right)^2-\left(y-1\right)^2=17 

b)

 (x2)2+(y1)2 =17\left(x-2\right)^2+\left(y-1\right)^{2\ }=17 

c)

 (x+2)2+(y+1)2=17\left(x+2\right)^2+\left(y+1\right)^2=17 

d)

 (x+2)2(y+1)2=17\left(x+2\right)^2-\left(y+1\right)^2=17