How many deltas are present in a whorl fingerprint pattern?

In a whorl fingerprint pattern, there are typically two deltas. The delta points in a fingerprint are the locations where ridge lines diverge, creating a triangular shape. In a whorl, the configuration of the ridges forms a circular or spiral pattern, and these two deltas help in categorizing the fingerprint type.

The presence of two deltas distinguishes whorls from loops and arches, which have a different delta count. Loops generally have one delta, while arches do not have any deltas at all. Understanding the delta structure is crucial for fingerprint analysis and classification, as it helps forensic experts and technicians identify and differentiate between various fingerprint patterns effectively. Therefore, identifying two deltas is a defining characteristic of whorl patterns.