Simson also made many discoveries of his own in geometry and the Simson line is named after him. However the Simson line does not appear in his work but Poncelet in Propriétés Projectives says that the theorem was attributed to Simson by Servois in the Gergonne 's Journal.
Simson din ginawa ng maraming discoveries ng kanyang sariling sa geometry at ang Simson linya ay pinangalanang matapos kanya. Subalit ang Simson linya ay hindi lilitaw sa kanyang trabaho ngunit Poncelet sa Propriétés Projectives nagsasabi na ang teorama ay na maiugnay sa Simson sa pamamagitan ng Servois sa Gergonne 's Journal.