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

 
 
 

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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 $$y +$$ $$x + $$ $$= 0$$



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