Question:
Two identical triangles overlapped each other to form six smaller identical equilateral triangles as shown below. The area of the shaded part is 78 cm². Find the area of 1 unshaded equilateral triangle.
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Two identical triangles overlapped each other to form six smaller identical equilateral triangles as shown below. The area of the shaded part is 78 cm². Find the area of 1 unshaded equilateral triangle.