- A line l and a point P. We’ll construct a line perpendicular to l through P.
- Draw a circle with center P, large enough to intersect with l in points A and B.
- Draw a new circle with center A, through B.
- Draw another circle, now with center B, through A.
- Construct the intersections C and D of these two circles.
- Connect C and D to construct the perpendicular.

## Forming Wisdom