# Introduction

The tangent to a circle is perpendicular to the radius of the circle. You can move point P to see this.
You can use this to find the equation of the tangent to a circle at any point on the circle.

Created with GeoGebra

Finding the equation of a tangent to a circle

Read the question and then use the Next button to advance through the solution

Click the New button to generate another example

Finding the equation of a tangent to a circle

Use a pen and paper for working. Give your answers as exact whole numbers with the coefficient of $y$ positive.

The equation of the tangent is $y +$ $x +$ $= 0$

Click the New button to generate another question