Thales' theorem of triangle interior angle sum was proved by the ancient Greek mathematician Euclid.

Thales was a thinker, mathematician, scientist and philosopher in ancient Greece, and the founder of Miletus School, the earliest school of philosophy in Greece. Is the first mathematician in history. One of the seven sages of Greece, the first thinker with a name in the history of western thought, is called "the father of science and philosophy". Thales was the first natural scientist and philosopher in ancient Greece and the West. Thales' students include anaximander and Anaximenes.

Euclid (Greek: ε υ κ λ ε ι δ η? 330 BC-275 BC), an ancient Greek mathematician. He was active in Alexandria during the period of Ptolemy I Soter (364 BC-283 BC) and was called "the father of geometry". His most famous book, The Elements of Geometry, is the foundation of European mathematics, and puts forward five formulas, Euclid Geometry, which is widely regarded as the most successful textbook in history. Euclid also wrote some works about perspective, conic curve, spherical geometry and number theory.

For more information about which mathematician discovered triangles, please visit:/ask/b480fd1615832825.html? Zd view more content