Step 1
Start with a circle with a center O and a point on the circle P.
Step 2
Using a straight edge draw a line that starts at O and goes through P.
Step 3
Put your compass on P and draw two points, Q and R, on the line OP. These points should be the same distance from P.
Step 4
Measure out the distance from Q to R.
Step 5
Draw the point S by creating two
arcs from points Q and R. Use the distance measured in Step 4.
Step 6
Draw the tangent line PS.