It is even more difficult for the ancients to learn geometry. It is said that when they study the theorem that the two base angles of an isosceles triangle are equal, many people can't learn it anyway, so this theorem is also called "donkey ladder". Today, some knowledge of plane geometry or some theorems of solid geometry still stumped a large number of people, so when King Dorothy asked Euclid for a shortcut to learn geometry, Euclid told him: "In geometry, the king has no shortcut."

2, the ancient Greek mathematician Archimedes:

King Luo Hai of Syracuse commissioned a goldsmith to build a pure gold crown, but he suspected that it was doped with silver, so he asked Archimedes to identify it. Archimedes found that water overflowed from the basin when he took a bath, so he realized that although objects of different materials have the same weight, the discharged water is not equal because of their different volumes. According to this truth, it can be judged whether the crown is adulterated. Archimedes jumped up with joy and ran home naked, shouting, "Found it! Eureka! " (I found it), so I started streaking in the street until I got home.