Analysis process of national mathematics volume of college entrance examination 1 1 science test questions.
Can you see it? As shown in the figure: AB = A, AD = B, AC = C. ∠ Bad = 120, ∠ BCD = 60; So a, b, c, d four-point * * * circle, analysis shows that when the line segment AC is the diameter. The absolute value c is the largest, and the maximum value is 2.