++++ ++++ ++++ ++++ ++++ Concept Question ++++ ++++ ++++ ++++ ++++ The state of stress at a point is completely determined when: 1. the stress vectors on three di?erent planes are speci?ed 2. the stress vectors on two di?erent planes are speci?ed 3. the stress vectors one arbitrary plane is spec- i?ed ? ++++ Statement (1) ? ++++ Statement (2) ? ++++ Statement (3) ? ++++ None of the above statements ? ++++ DKDU ++++ ++++ ++++ ++++ ++++ Answer ++++ ++++ ++++ ++++ ++++ The correct answer to the concept question is: ++++