Tangents through an external point
Geometry construction using a compass and straightedge
This page shows how to draw the two possible
to a given circle through an external point with compass and straightedge or ruler.
This construction assumes you are already familiar with Constructing the Perpendicular Bisector of a Line Segment.
Printable step-by-step instructions
The above animation is available as a
printable step-by-step instruction sheet, which can be used for making handouts
or when a computer is not available.
Try it yourself
Click here for a printable tangents construction worksheet with some problems to try.
When you get to the page, use the browser print command to print as many as you wish. The printed output is not copyright.
Constructions pages on this site
Circles, Arcs and Ellipses
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