Write the standard equation of the circle below.

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-A09/b/assessments/C-EquationsofaCircleQuiz/Geometry_7.3_Quiz_FINAL_23q.jpg

Question

Write the standard equation of the circle below.

http://curriculum.kcdistancelearning.com/courses/GEOMx-HS-A09/b/assessments/C-EquationsofaCircleQuiz/Geometry_7.3_Quiz_FINAL_23q.jpg

vera_ewing · Answer

@ganeshie8 @mathstudent55 @experimentX @radar

vera_ewing · Answer

@Luigi0210 @Destinymasha @Loser66

anonymous · Answer

how is a circle defined?

vera_ewing · Answer

I'm not sure...

anonymous · Answer

really? you should have a look... http://www.mathopenref.com/circle.html

vera_ewing · Answer

@experimentX can you help? i think the answer is x2 + (y + 2)2 = 3 . I'm not sure.

anonymous · Answer

do you know the distance formula?

vera_ewing · Answer

Yes.

vera_ewing · Answer

http://www.purplemath.com/modules/xyplane/dist07b.gif

anonymous · Answer

a circle is the set of points that is equidistant from a given point.  the "given" point is the center.

vera_ewing · Answer

OK...but I am just wondering if my answer is correct. I don't want to get it wrong :)

anonymous · Answer

so if you know the center point, then the other points are (x, y) and then you use the distance formula to write the equation.  what is the center of your circle?

anonymous · Answer

do you want to learn or just get the answer right?

vera_ewing · Answer

(3, 2) ?

anonymous · Answer

Great!!! so (3, 2) is not the center, though.  have a look again.

*Hint, hint, wink wink... it's the red point.

anonymous · Answer

you still there?

vera_ewing · Answer

@pgpilot326 sorry i was eating breakfast. and the center point is (0, -2)

vera_ewing · Answer

@pgpilot326 are you there?

vera_ewing · Answer

@pgpilot326