Thales is a Greek mathematician, astronomer and philosopher. He was born in 654 BC in Miletus (Greece) and he died in 546 BC. A lot of people regard him as the first philosopher because he tried to explain natural phenomena without referencing to mythology and gods. For example he tried to explain earthquakes by saying that the earth floats on water and each time an earthquake occur it is due to the movement of the waves.
Major work:-He determined the day of a solar eclipse.
-He calculated the height of the pyramids by calculating the height of its shadow at the same time his height measured the same height as his shadow.
-There are two Thales’ theorems:-If a, b and are points on a circle and AC is the diameter of the circle the angle ABC is a right angle:
α+ (α+β) + β = 180°
2α + 2β = 180°
α + β= 90°
-(DE) //(BC)
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