(14) the circle equation whose centre lies on the straight line y = 5 x and touches
x-axis could be
(a) (x - 2)2 + (y – 1)2 = 4
(b) (x – 4)2 + (y - 2)2 = 16
(c) (x - 2)2 + (y - 4)2 = 16 (d) (x – 4)2 + (y – 2)2 = 4
(15) area of the square whose vertices lie on the circle : x2 + y2 - 4 x+6 y +4=0
is square units.
(a) 6
(b) 9
(c) 12
(d) 18
(16) the geometrical centre of square abcd is the origin and its side length is 2v3
, then the equation of the circle that touches its sides is
(a) x2 + y2 = 3
(b) x2 + y2 = 12
(c) x2 + y2 = 6
(d) (x -v3) + (y-v3 )' = 3
72