Which ancient greek idea is still used today to describe the relationship between the sides of a right triangle?
a euclids
b hippocratic
c pythagorean
d architecture theory

I believe the answer is: c. Pythagorean

Pythagorean formula was first introduced by famous ancient greek's mathematician named Pythagoras of Samos. The phytagoras formula that he created to describe relationship between sides of triangle is still used even in modern day Geometry.

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explanation:

probally   a few days after there called