Circle 2 Question 6

7. If one of the diameters of the circle x2+y22x6y+6=0 is a chord to the circle with centre (2,1), then the radius of the circle is (2004,1M)

(a) 3

(b) 2

(c) 3

(d) 2

Show Answer

Answer:

Correct Answer: 7. (c)

Solution:

  1. Here, radius of smaller circle, AC=12+326=2

Clearly, from the figure the radius of bigger circle

r2=22+[(21)2+(13)2]r2=9r=3



NCERT Chapter Video Solution

Dual Pane