Question

Circle P has a radius of 8 units with center P at (2, -1). Which equation defines circle P?

(x + 2)2 + (y – 1)2 = 64

(x – 2)2 + (y + 1)2 = 64

(x – 2)2 + (y + 1)2 = 8

(x + 2)2 + (y – 1)2 = 8

Answer 1

what do you think it is?

Answer 2

tbh i used to understand this but i kinda forgot now :( i know it has something to do with -y and -x but im not sure

Answer 3

so the radius is 8^2 right?

Answer 4

yes

Answer 5

so what do you think it is now?

Answer 6

is there any formula that you could give me? im honestly really lost :c sorry

Answer 7

(x -h)^2 + (y - k)^2 =r^2

Answer 8

ok so (2-h)^2+(1=k)^2=8^2
??

Answer 9

(1+k)***

Answer 10

oh umm h is 2 and k is -1

Answer 11

ohhh right!
(x-2)^2+(y-1)^2=8^2
ohhh ok xD
thank you

Answer 12

its y+1

Answer 13

oh right! cuz negative turns to positive >.< sorry i always forget that! thank you though!!

Answer 14

No problem :)