I. How to Draw a Perpendicular to a line from a Point Not
on the Line
Given: Line A-B and point P
Step 1: Using P as a center, swing an arc (R1) to intercept
line A-B at points G and H.
Step 2: Swing larger, but equal length arcs (R2) from each of
the points G and H to intercept each other at point J.
Step 3: Line P-J is perpendicular to line A-B
Figure 4.16 Example on how to draw a perpendicular line, to a
point outside the line