Geometrie

https://de.serlo.org/mathe/geometrie/konstruktion-geometrischen-objekten/mittelsenkrechte

https://de.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circum-in-circles/v/constructing-circumscribing-circle

https://de.khanacademy.org/math/geometry-home/geometric-constructions/constructing-tangents/v/constructing-a-tangent-line-using-compass-and-straightedge?modal=1

https://de.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-circum-in-circles/v/constructing-circle-inscribing-triangle

https://de.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-bisectors/v/constructing-a-perpendicular-bisector-using-a-compass-and-straightedge

https://de.serlo.org/mathe/geometrie/konstruktion-geometrischen-objekten/dreiecke-konstruieren

https://de.khanacademy.org/math/geometry/hs-geo-congruence/hs-geo-bisectors/v/constructing-an-angle-bisector-using-a-compass-and-straightedge