A tangent to a circle at point P is a straight line that touches the circle at P. The tangent is perpendicular to the radius which joins the centre of the circle to the point P. As the tangent is a ...

Two intersecting lines are tangent to two circles and form an angle of 74°. The circles have area ratios of 36 to 25. The distance from the point of tangency on the large circle to the point of ...

As the tangent is a straight line, the equation of the tangent will be of the form \(y = mx + c\). We can use perpendicular gradients to find the value of \(m\), then use the coordinates of P to find ...