Final answer:
The three pathologic changes commonly found in the joint of a person with rheumatoid arthritis are synovitis, pannus formation, and cartilage destruction. Osteoarthritis is not a pathologic change associated with rheumatoid arthritis.
Step-by-step explanation:
Rheumatoid arthritis is an inflammatory disorder that primarily affects the synovial joints, causing swollen, stiff, and painful joints. In this condition, the joint capsule and synovial membrane become inflamed, leading to various pathologic changes.
The three pathologic changes commonly found in the joint of a person with rheumatoid arthritis are synovitis, pannus formation, and cartilage destruction. Osteoarthritis, on the other hand, is a different type of arthritis that results from aging or joint wear and tear, and it is not typically associated with rheumatoid arthritis.