Final answer:
The knees of a cyclist, the legs of a runner, and the arms of a swimmer demonstrate angular movements, specifically flexion and extension, which are types of movements allowed by synovial joints.
Step-by-step explanation:
The knees of a cyclist, the legs of a runner, and the arms of a swimmer all exhibit angular movements, which are produced when the angle between the bones of a joint changes. This type of movement is one of the ranges of movement allowed by synovial joints. Examples of angular movements include flexion and extension. Flexion occurs when the angle between the bones decreases, such as when a cyclist's knee bends during pedaling. Extension is the opposite motion, where the angle between the bones increases, as in the straightening of a leg in running or an arm in swimming.