The straight line `3x+4y=20` and the circle `x^2+y^2=16` then

Show that the straight line 3x + 4y = 20 touches the circle x ^2 + y ^2 = 16.

If the straight line 3x + 4y = k touches the circle x^2+y^2-10x = 0, then the value of k is:

The length of intercept on the straight line 3x + 4y -1 = 0 by the circle x^(2) + y^(2) -6x -6y -7 =0 is

The length of intercept on the straight line 3x + 4y -1 = 0 by the circle x^(2) + y^(2) -6x -6y -7 =0 is

If the straight line 3x + 4y = k touches the circle x^(2) + y^(2) = 16 x , then the values of k are

The locus of the mid-point of the chord of contact of tangents drawn from points lying on the straight line 4x-5y=20 to the circle x^2+y^2=9 is : (A) 20(x^2+y^2)-36+45y=0 (B) 20(x^2+y^2)+36-45y=0 (C) 20(x^2+y^2)-20x+45y=0 (D) 20(x^2+y^2)+20x-45y=0

The pole of a straight line with respect to the circle x^2+y^2=a^2 lies on the circle x^2+y^2=9a^2 . If the straight line touches the circle x^2+y^2=r^2 , then :

The straight line 3x-4y +7 = 0 is a tangent to the circle x^(2) + y^(2) + 4x + 2y + 4 = 0 at P, find the equation of its normal at the same point.

The pole of a straight line with respect to the circle x^(2)+y^(2)=a^(2) lies on the circle x^(2)+y^(2)=9a^(2) . If the straight line touches the circle x^(2)+y^(2)=r^(2) , then