What type of weather front is represented with semi-circles on top and triangles on the bottom?

The type of weather front that is represented with semi-circles on top and triangles on the bottom is known as a stationary front. In meteorology, stationary fronts occur when two air masses meet, but neither is strong enough to replace the other. The semi-circles indicate the warm air mass, while the triangles denote the cold air mass. This configuration represents a balance between the two, resulting in the front not advancing in either direction, which is characteristic of stationary fronts.

Understanding the symbols used in weather forecasting is crucial for accurate interpretation of weather maps, and recognizing this specific arrangement helps in identifying stationary fronts and predicting the weather patterns associated with them.