Inscribed equilateral triangle side is a = r√3. Triangle area is (√3/4) x a² = (√3/4) x 3r² = (3√3/4)r². Dividing by circle area πr² yields ratio (3√3) / (4π) ≈ 0.413.
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Inscribed equilateral triangle side is a = r√3. Triangle area is (√3/4) x a² = (√3/4) x 3r² = (3√3/4)r². Dividing by circle area πr² yields ratio (3√3) / (4π) ≈ 0.413.