Linked from
The 15 pages that link to Hohmann transfer orbit, each with the reason it gives.
Vis-viva equationRelated: Vis-viva gives the speeds required at both ends of the transfer ellipse.
PeriapsisRelated: Its transfer ellipse has periapsis at one endpoint orbit.
OrbitRelated: It shows how orbital geometry can reduce the propellant needed to change orbit.
Kepler orbitBroader topic: It uses a Kepler ellipse as an idealized spacecraft transfer trajectory.