Circle Tangent Line Calculator: Find Tangent Equation
Easily calculate the equation of a tangent line to a circle with our online tool. Input circle center, radius, and a point on the circle for instant results and visualization.
Understanding Circle Tangent Lines
In geometry, a tangent line to a circle is a straight line that touches the circle at exactly one point, called the point of tangency. The tangent line is always perpendicular to the radius of the circle at this point. This calculator helps you find the equation of this tangent line given the circle's center, radius, and a point on the circle. The equation is typically represented in the slope-intercept form (y = mx + c) or in special cases as vertical lines (x = a) or horizontal lines (y = b). Use this tool to explore and understand the relationship between circles and their tangent lines.