Mathematics - Circle Question with Solution | TestHub

$L$ is a direct common tangent of $C_1$ and $C_2$

$L$ is a transverse common tangent of ${\mathrm{C}}_1$ and ${\mathrm{C}}_2$

$L$ is the radical axis of $C_1$ and $C_2$

$L$ is perpendicular to the line joining centres of ${\mathrm{C}}_1$ and ${\mathrm{C}}_2$