From the history of maths
Maryam Mirzakhani
She won gold at the International Mathematical Olympiad in 1994 and 1995, the second time with a perfect score.
In 2014 she became the first woman to win the Fields Medal, for her work on curved surfaces. This photo is from that year.
Gert-Martin Greuel, CC BY-SA 2.0 de, via Wikimedia Commons (resized)
Where you’ll meet Mirzakhani here
Geometry
They turn up beside problems and lessons on these topics.
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Archimedes
Using 96-sided polygons he trapped π between 3 10/71 and 3 1/7.
He asked for a sphere inside a cylinder on his tomb, to mark his proof that the sphere fills two-thirds of it.
Painted in 1620; an imagined likeness. Domenico Fetti, Public domain, via Wikimedia Commons