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

Question

hartnn · Answer

a general equation of circle is 
$(x-h)^2+(y-k)^2=r^2$
where h,k is centre
r is radius.

anonymous · Answer

$$(x+2)^{2}+(y-1)^{2}=(2\sqrt{2})^{2}$$

hartnn · Answer

=8^2

hartnn · Answer

u get that @Patastic81 ?

anonymous · Answer

sorry it will be $$8^{2}$$

hartnn · Answer

$(x+2)^{2}+(y-1)^{2}=8^2$

anonymous · Answer

@Patastic81 it should be 8^2

hartnn · Answer

there are 3 tabls below
Equaion
Draw
Attach File
did u see those ?

hartnn · Answer

*Equation

hartnn · Answer

u click on Attach Files, and u can upload the pic.

hartnn · Answer

when u click on  Attach Files. a new window will appear.

hartnn · Answer

where are those points , are those random or they form diameter ?

hartnn · Answer

after u attached, u click Post.

hartnn · Answer

means u have pic in your computer, right ?

hartnn · Answer

so where is the pic ? 
u can take screenshot and save it in your computer.

hartnn · Answer

'the pic is on my comp... but its not saved'
i am not sure what that means ....

hartnn · Answer

can u take screenshot ? 
i don't think u can save the assignment in your computer...

hartnn · Answer

thats clear

hartnn · Answer

first of all, u can observe that the centre is in 2nd quadrant, right ?

hartnn · Answer

so, centre is ...?

hartnn · Answer

|dw:1353601316906:dw|

hartnn · Answer

radius is length of segment from centre to any point on circle.

hartnn · Answer

new question, new post please :)

hartnn · Answer

see my first comment, and tell me the centre.

hartnn · Answer

h=.... ? 
k=.....?

hartnn · Answer

before attaching circles, please find centre.

hartnn · Answer

see my first comment.
compare your equation with that equation and tell me what u get for h=....? 
k=......?
r=...... ?

hartnn · Answer

i can only delete my comments.

hartnn · Answer

thats why we say, new question , new post.....but lets do this one here.

hartnn · Answer

u had your equation, compare it with this eq. 
$(x-h)^2+(y-k)^2=r^2$

hartnn · Answer

and find, h,k,r

anonymous · Answer

let me post all four pics first then we start okay? because it wont allow me to post all four at same time okay?

hartnn · Answer

we can do this without options..

anonymous · Answer

my answer is a picture, please just let me post?

anonymous · Answer

first one

hartnn · Answer

just give the equation.

anonymous · Answer

second one

anonymous · Answer

third one

anonymous · Answer

fourth one

anonymous · Answer

those are my 4 possible answers

anonymous · Answer

the questions is:  Circle T has an equation of (x + 10)2 + y2 = 25. Which graph represents circle T?

anonymous · Answer

how can i answer this question sir?

hartnn · Answer

|dw:1353603114825:dw|