d length of d chord of d circle  x^2+y^2+4x-7y+12=0 along d y-axis is ...........

 

d no.of  points with integral co-ordinates dat r integral coordinates dat r interior to d circle x^2+y^2=16

 

P(rt2,rt2) is a point on d circle x^2+y^2=4 & Q is another point on  d circle  such dat arc PQ=1/4 (circumcircle)  d coordinates of Q r