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Aiswarya Ram Gupta Grade: 12
        

how to find the equation of a circle which touches x-axis and its centre (h,k) is given..??

6 years ago

Answers : (4)

vikas askiitian expert
510 Points
										

if circle touches x axis then always y coordinate of center is radius of that circle ..


 r = k


eq of circle : (x-h)2 + (y-k)2 = k2


                  x2 + y2 - 2xh - 2yk + h2 = 0


this is the required eq of circle....

6 years ago
vijesh jayan
49 Points
										

(X-H)2+(Y-K)2=R2


(H,K) IS CENTRE


TOUCHES X AXIS MEANS X HAS SOME VALUE AND Y =0


THEREFORE  (X-H)2+(-K)2=R2


(X-H)2+K2 = R2


IS WHAT I THINK


APPROVE PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ

6 years ago
Surbhi Kumari
29 Points
										

since the centre is given u can use the center - radius form of the equation i.e.


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


where r=k

6 years ago
Aiswarya Ram Gupta
35 Points
										

thnx

6 years ago
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