Question: what are the two types of joints in the elbow?
Answer: The elbow: The elbow joint is a synovial hinge joint with two articulations. The trochlea of the humerus articulates with the trochlear notch of the ulna, and the capitulum of the humerus articulates with the head of the radius. ... 
The radioulnar joints: Two separate joints exist between the radius and the ulna.