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 |