Basic Geometric constructions
With just a compass and a straightedge (or virtual versions of them), you’ll be amazed by how many geometric shapes you can construct perfectly.
This is the “pure” form of geometric construction: no numbers involved.
Basic Geometric constructions
| Mostly used things were these two ⇓ | |
 | Line Bisector |
 | Angle Bisector |
| And it is useful to know how to do 30°, 45° and 60° angles. We can use the angle bisector method (above) to create other angles, such as 15°, etc: | |
 | 30 Degree Angle |
 | 45 Degree Angle |
 | 60 Degree Angle |
 | Equilateral Triangle |
| Points and Lines: | |
 | Perpendicular to a Point on a Line |
 | Perpendicular to a Point NOT on a Line |
 | Parallel Line through a Point |
 | Same (Congruent) Angle |
 | Cut a line into N segments |
| Circles: | |
 | Center of a Circle |
 | Point to Tangents on a Circle |
 | Inscribe a Circle in a Triangle |
 | Circumscribe a Circle on a Triangle |
 | Circle touching 3 Points |
| And for the “Master Class”, a Pentagon | |
 | Pentagon |