## Length of Tangent to a Circle Formula From an External Point

Here you will learn what is the length of tangent to a circle formula from an external point with example. Let’s begin – Length of Tangent to a Circle Formula The length of tangent drawn from point ($$x_1,y_1$$) outside the circle S = $$x^2 + y^2 + 2gx + 2fy + c$$ = 0 is, …