Answer:
A half-moon shaped corral is called a "medialuna" in Chile.
Step-by-step explanation:
The medialuna is the sports infrastructure that houses the rodeo, national sport of Chile. Its shape is circular with a radius of 20 to 25 meters. The "apiñadero" is located on its west side, which is where the race begins and has a radius of 18 to 22 meters. On the north and south sides are located face to face the shortcuts, an area of 12 meters of padded sacks, where the steer has to be cut.