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Answer:

Step-by-step explanation:

To count the number of triangles in the figure, let's break it down step by step:

Step 1: Count the triangles in each row separately.

Row 1: There is 1 triangle.

Row 2: There are 2 triangles.

Row 3: There are 3 triangles.

Row 4: There are 4 triangles.

Step 2: Add the triangles from each row together.

1 + 2 + 3 + 4 = 10