3. (8 points) As shown in the figure, all 3 large triangles are equilateral triangles, then there are $\qquad$ triangles in the figure.



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【Answer】Solution: According to the analysis, the number of small triangles is: 9; the number of triangles containing two small triangles is: 18; the number of large triangles is: 3, so the total number of triangles is: $9+18+3=30$.