Two chords 2a and 2b of a circle are perpendicular to each other at a point they meet. If the distance between the centre of circle to this point is c (`clt` radius of circle) then what is radius of circle.

Options

A. `a+b+c`
B. `sqrt((a^(2)+b^(2)-c^(2))/(2))`
C. `sqrt(a^(2)+b^(2)-c^(2))/(2)`
D. `sqrt((a^(2)+b^(2)+c^(2))/(2))`