This is the step-by-step, printable version. If you PRINT this page, any ads will not be printed.
See also the animated version.
|After doing this
|Your work should look like this
We start with a given circle with center O, and a point P outside the circle.
|1. Draw a straight line between the center O of the given circle and the given point P.
2. Find the midpoint of this line by constructing the line's perpendicular bisector.
|3. Place the compasses on the midpoint just constructed, and set its width to the center O of the circle.
|4. Without changing the width, draw an arc across the circle in the two possible places. These are the contact points J, K for the tangents.
|5. Draw the two tangent lines from P through J and K.
|6. Done. The two lines just drawn are tangential to the given circle and pass through P.