Answer: 4
Which geometer developed the deductive reasoning method for geometric proofs that is used today?
1. Rene Descartes
2. Pythagoras
3. Girard Desargues
4. Euclid
Deductive reasoning, unlike inductive reasoning, is a valid form of proof. Euclid using his definitions, common notions and postulates as an axiomatic system, was able to produce deductive proofs of a number of important geometric propositions.
Explanation: