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equation of a circle
write the equation
sketch the graph
100

what is the equation for standard form of a circle 

(x-h)2 + (x-k)2 = r2

100

center: (-8, -9) 

area: 16𝝅 

(x+8)2 + (y+9)2 = 16

100

x2 + (y +4)2 = 9 

center: (0,-4) 

radius: 3

200

center: (1, -4) 

radius: 9 

(x-1)2 + (y+4)2 = 81

200

center: (3,6)

circumfrence: 16𝝅

(x-3)2 + (y-6)2 = 64

200

(x − 3)2 + ( y − 3)2 = 9

center: (3,3)

radius: 3 

300

Center: (-14, -3) 

radius: 4 

(x+14)2 + (y+3)2 = 16

300

center: (9,-15)

tangent to y= -14

(x-9)2 + (y+15)2= 1

300

(x − 4)2 + ( y + 3)2 = 9

center: (4, -3)

radius: 3 

400

center: (12, 10)

radius: 5 

(x-12)2 + (y-10)2 = 25

400

center: (-11, -14) 

tangent to x= -15

(x+11)2 + (y+ 14)2 = 16

400

(x + 1)2 + ( y + 2)2 = 25

center: (-1, -2)

radius: 5 

500

center: (-3,0) 

radius: 15 

(x+3)2 + y2 = 225 

500

center: (15,5)

point on circle: (18, 5) 

(x-15)2 + (y-5)2 = 9

500

(x + 4)2 + ( y + 2)2 = 1

center: (-4, -2)

radius: 1