Final answer:
The distal end of the radius articulates with two carpal bones to form the radiocarpal joint or wrist joint, and the ulnar notch of the radius articulates with the head of the ulna to form the distal radioulnar joint.
Step-by-step explanation:
The distal end of the radius articulates with two carpal bones to form the radiocarpal joint or wrist joint. On the medial side of the distal radius is the ulnar notch of the radius. This shallow depression articulates with the head of the ulna, which together form the distal radioulnar joint.