Final answer:
Two pattern block rhombuses can be combined to make one pattern block triangle in typical educational sets used for geometry.
Step-by-step explanation:
The question at hand involves understanding the relationship between two different shapes in a pattern block set. A pattern block rhombus and a pattern block triangle are shapes used for educational purposes to help students learn about geometry and spatial reasoning. In many pattern block sets, two rhombuses can be combined to make a triangle. So, the answer to the question "How many pattern block rhombuses make a triangle?" is B. 2.
A pattern block rhombus is a specific shape made up of different pattern blocks. To form a triangle, four pattern block rhombuses are needed. Each pattern block rhombus takes up one-fourth of the triangle, and when four of them are put together, they complete the shape of a triangle.