To determine how many triangles of all sizes are in a specific diagram, one would typically need to analyze the diagram directly, as the number and types of triangles can vary greatly depending on the structure and arrangement of lines and shapes.
If you have a specific diagram in mind, please describe it or provide details about its structure (e.g., a grid of points, intersecting lines, etc.), and I would be happy to help you calculate the number of triangles contained within it!
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