Question

Will Fan and Medal

Write an equation of a circle with the given center and radius.

center (-7, -6)
radius 2

a (x+7)^2+(y+6)^2=4
b (x-7)^2+(y-6)^2=2
c (x+7)^2+(y+6)^2=2
d (x-7)^2+(y-6)^2=4

Answer 1

are you good at math? @golden_bullets

Answer 2

@iTiaax
@jdoe0001

Answer 3

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/example-2-equation-of-circle.png <-- you are given the radius and center, thus just plug your values in

Answer 4

@jdoe0001 explain

Answer 5

\(\bf center \quad ({\color{red}{ -7}}, {\color{blue}{ -6}}) \qquad radius=2
\\ \quad \\

(x-{\color{red}{ h}})^2+(x-{\color{blue}{ k}})^2=r^2\)

Answer 6

so... what would you get?

Answer 7

okay,

(x+7) ^2+(x+6)^6=4

Answer 8

ooops... darn that should be a "y" so \(\bf center \quad ({\color{red}{ -7}}, {\color{blue}{ -6}}) \qquad radius=2
\\ \quad \\

(x-{\color{red}{ h}})^2+(y-{\color{blue}{ k}})^2=r^2\)

Answer 9

@jdoe0001 what now

Answer 10

plug the values in

Answer 11

didn't I do that?

(x+7) ^2+(y+6)^6=4

@jdoe0001 how is this and now what?