Georg Mohr

Jørgen Mohr was a Danish mathematician, known for being the first to prove the Mohr–Mascheroni theorem, which states that any geometric construction which can be done with compass and straightedge can also be done with compasses alone.

1 April 1640

Born on the same birth day (1 April): Ajit Wadekar • Alberta Hunter • Amos Milburn • Aprille Ericsson • Bernard Stiegler • Chris Evans (presenter) • Debbie Reynolds • Edgar Wallace • Ernest Barnes • Ferenc Puskás • François de Bonne, Duke of Lesdiguières • Harry Carney • John Abizaid • John Wilmot, 2nd Earl of Rochester • Jonathan Haze • Joseph de Maistre • Lon Chaney • Mark Shulman (author) • Peter Collinson (film director) • Phillip Schofield • Robin Lopez • Ruth Beitia • Shivakumara Swami • Stephen Fleming

Born in the same month (April 1640): Gaspar Sanz