If each side of a triangle is doubled, then find percentage increase in its area.
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Explanation

To solve the problem of finding the percentage increase in the area of a triangle when each of its sides is doubled, we can follow these steps:

### Step-by-Step Solution:

1. **Define the Original Triangle:**
Let the sides of the original triangle be \( A, B, C \).

2. **Calculate the Semi-Perimeter of the Original Triangle:**
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