Geometric Constructions ... Animated!
"Construction" in Geometry means to draw shapes, angles or lines accurately.
These constructions use only compass, straightedge (a ruler, but not using the numbers) and a pencil.
This is the "pure" form of geometric construction: no numbers involved!
Learn these two first, they are used a lot:
Points and Lines
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.
Circles and Tangents
And for the "Master Class":