What does a 180-degree arc imply for a sprinkler head?

A 180-degree arc for a sprinkler head indicates that it will water a half circle. This means the sprinkler will cover an area of 180 degrees around its central point, effectively producing a semi-circular spray pattern.

Understanding sprinkler arcs is essential for effective irrigation design as it helps ensure that water is distributed evenly across the designated area. A half-circle coverage is useful for areas that have barriers or are adjacent to structures since it allows the sprinkler to cover the area without overlapping into spaces that don't require irrigation.

In contrast, options suggesting a full circle, quarter circle, or eighth circle arc misrepresent the coverage area corresponding to a 180-degree arc, which specifically denotes half of a complete circle. This distinction is critical for selecting appropriate sprinkler heads based on the specific irrigation needs of a landscape.