Length of Tangent from External Point

Rarely Tested
From $$P(x_1,y_1)$$ to circle $$S = 0$$:
$$\sqrt{S(x_1,y_1)} = \sqrt{x_1^2 + y_1^2 + 2gx_1 + 2fy_1 + c}$$
No related questions available for this formula yet.

Go back to topics

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.

Enroll Now