The starting points, such as "a straight line segment can be drawn joining any two points."
by Alfred S. Posamentier. "Geometry Revisited" by H.S.M. Coxeter. Plane-Euclidean-Geometry-Theory-And-Problems-Pdf-Free-47
by S.L. Loney (for a mix of plane and algebraic theory). The starting points, such as "a straight line