A circle is inscribed in an equilateral triangle of side 12 cm. The area of the region between the triangle and the circle is approximately

1. Triangle area = (square root of 3)/4 × 144 ≈ 62.35 sq cm. 2. Incircle radius = side/(2 (square root of 3)) ≈ 3.464; area ≈ pi × 12 ≈ 37.71 (incircle). 3. Difference ≈ 62.35 - 37.71 ≈ 24.64 → option ≈ 25 sq cm. _Source: NCERT Class 10 Mathematics, Ch 11 "Areas Related to Circles", §11.2_