数图形。图中共有几个三角形？---**Chart/Diagram Description:** * **Type:** Geometric figure composed of multiple interconnected triangles. * **Description:** The figure consists of 6 identical equilateral triangles arranged in a grid-like pattern of 2 rows and 3 columns. The two rows share a common horizontal line in the middle. The triangles in the top row have their bases on this middle line and their apexes pointing upwards, forming the top boundary of the figure. The triangles in the bottom row have their bases on the same middle line and their apexes pointing downwards, forming the bottom boundary of the figure. The left and right boundaries of the overall shape are formed by the slanting sides of the outermost triangles. The top and bottom boundaries are horizontal lines. The internal structure consists of a horizontal line in the middle and intersecting diagonal lines that form the sides of the triangles. The figure contains 12 vertices and 15 line segments forming the edges of the triangles.