Math 150

Spring 2000

Theorems about Compass and Straightedge Constructions

Dr. Wilson

1. To copy an angle

2. To bisect an angle

3. To erect a perpendicular from a point

4. To drop a perpendicular from a point not on a line to the line.

5. To construct the perpendicular bisector of a line segment.

6. To construct the tangents from a point to a circle.