Emma and Me have presented the theorem of thales.
So Here it is.
Thales Miletus was the innovator of the theorem, a great greek philosopher and mathimatician too.
He was born around 624BC and died in 546BC.
He discovered many thing like the five theorems.
Even though, eguptians and babylonians were the first to discover this theorem, it took the name of the one who prooved it : Thales.
It's a particular case of the intercept theorems.
So, Thales' theorem says : if A, B and C are points on a circle where the line AC is a diameter of the circle, then the angle ABC is a right angle.